[{"_id":"59343","user_id":"220","language":[{"iso":"eng"}],"publication":"Mathematische Annalen","type":"journal_article","abstract":[{"text":"<jats:title>Abstract</jats:title>\r\n          <jats:p>On a finite regular graph, (co)resonant states are eigendistributions of the transfer operator associated to the shift on one-sided infinite non-backtracking paths. We introduce two pairings of resonant and coresonant states, the <jats:italic>vertex pairing</jats:italic> which involves only the dependence on the initial/terminal vertex of the path, and the <jats:italic>geodesic pairing</jats:italic> which is given by integrating over all geodesics the evaluation of the coresonant state on the first half of the geodesic times the resonant state on the second half. The main result is that these two pairings coincide up to a constant which depends on the resonance, i.e. the corresponding eigenvalue of the transfer operator.</jats:p>","lang":"eng"}],"status":"public","date_updated":"2025-04-04T07:59:58Z","publisher":"Springer Science and Business Media LLC","author":[{"first_name":"Christian","full_name":"Arends, Christian","last_name":"Arends"},{"first_name":"Jan","full_name":"Frahm, Jan","last_name":"Frahm"},{"id":"220","full_name":"Hilgert, Joachim","last_name":"Hilgert","first_name":"Joachim"}],"date_created":"2025-04-04T07:59:29Z","title":"A pairing formula for resonant states on finite regular graphs","doi":"10.1007/s00208-025-03140-7","publication_identifier":{"issn":["0025-5831","1432-1807"]},"publication_status":"published","year":"2025","citation":{"apa":"Arends, C., Frahm, J., &#38; Hilgert, J. (2025). A pairing formula for resonant states on finite regular graphs. <i>Mathematische Annalen</i>. <a href=\"https://doi.org/10.1007/s00208-025-03140-7\">https://doi.org/10.1007/s00208-025-03140-7</a>","mla":"Arends, Christian, et al. “A Pairing Formula for Resonant States on Finite Regular Graphs.” <i>Mathematische Annalen</i>, Springer Science and Business Media LLC, 2025, doi:<a href=\"https://doi.org/10.1007/s00208-025-03140-7\">10.1007/s00208-025-03140-7</a>.","bibtex":"@article{Arends_Frahm_Hilgert_2025, title={A pairing formula for resonant states on finite regular graphs}, DOI={<a href=\"https://doi.org/10.1007/s00208-025-03140-7\">10.1007/s00208-025-03140-7</a>}, journal={Mathematische Annalen}, publisher={Springer Science and Business Media LLC}, author={Arends, Christian and Frahm, Jan and Hilgert, Joachim}, year={2025} }","short":"C. Arends, J. Frahm, J. Hilgert, Mathematische Annalen (2025).","ieee":"C. Arends, J. Frahm, and J. Hilgert, “A pairing formula for resonant states on finite regular graphs,” <i>Mathematische Annalen</i>, 2025, doi: <a href=\"https://doi.org/10.1007/s00208-025-03140-7\">10.1007/s00208-025-03140-7</a>.","chicago":"Arends, Christian, Jan Frahm, and Joachim Hilgert. “A Pairing Formula for Resonant States on Finite Regular Graphs.” <i>Mathematische Annalen</i>, 2025. <a href=\"https://doi.org/10.1007/s00208-025-03140-7\">https://doi.org/10.1007/s00208-025-03140-7</a>.","ama":"Arends C, Frahm J, Hilgert J. A pairing formula for resonant states on finite regular graphs. <i>Mathematische Annalen</i>. Published online 2025. doi:<a href=\"https://doi.org/10.1007/s00208-025-03140-7\">10.1007/s00208-025-03140-7</a>"}},{"language":[{"iso":"eng"}],"user_id":"31496","_id":"63248","status":"public","abstract":[{"lang":"eng","text":"<jats:title>Abstract</jats:title>\r\n          <jats:p>The Navier–Stokes system <jats:disp-formula>\r\n              <jats:alternatives>\r\n                <jats:tex-math>$$\\begin{aligned} \\left\\{ \\begin{array}{l} u_t + (u\\cdot \\nabla ) u =\\Delta u+\\nabla P + f(x,t), \\\\ \\nabla \\cdot u=0, \\end{array} \\right. \\end{aligned}$$</jats:tex-math>\r\n                <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\r\n                  <mml:mrow>\r\n                    <mml:mtable>\r\n                      <mml:mtr>\r\n                        <mml:mtd>\r\n                          <mml:mfenced>\r\n                            <mml:mrow>\r\n                              <mml:mtable>\r\n                                <mml:mtr>\r\n                                  <mml:mtd>\r\n                                    <mml:mrow>\r\n                                      <mml:msub>\r\n                                        <mml:mi>u</mml:mi>\r\n                                        <mml:mi>t</mml:mi>\r\n                                      </mml:msub>\r\n                                      <mml:mo>+</mml:mo>\r\n                                      <mml:mrow>\r\n                                        <mml:mo>(</mml:mo>\r\n                                        <mml:mi>u</mml:mi>\r\n                                        <mml:mo>·</mml:mo>\r\n                                        <mml:mi>∇</mml:mi>\r\n                                        <mml:mo>)</mml:mo>\r\n                                      </mml:mrow>\r\n                                      <mml:mi>u</mml:mi>\r\n                                      <mml:mo>=</mml:mo>\r\n                                      <mml:mi>Δ</mml:mi>\r\n                                      <mml:mi>u</mml:mi>\r\n                                      <mml:mo>+</mml:mo>\r\n                                      <mml:mi>∇</mml:mi>\r\n                                      <mml:mi>P</mml:mi>\r\n                                      <mml:mo>+</mml:mo>\r\n                                      <mml:mi>f</mml:mi>\r\n                                      <mml:mrow>\r\n                                        <mml:mo>(</mml:mo>\r\n                                        <mml:mi>x</mml:mi>\r\n                                        <mml:mo>,</mml:mo>\r\n                                        <mml:mi>t</mml:mi>\r\n                                        <mml:mo>)</mml:mo>\r\n                                      </mml:mrow>\r\n                                      <mml:mo>,</mml:mo>\r\n                                    </mml:mrow>\r\n                                  </mml:mtd>\r\n                                </mml:mtr>\r\n                                <mml:mtr>\r\n                                  <mml:mtd>\r\n                                    <mml:mrow>\r\n                                      <mml:mrow/>\r\n                                      <mml:mi>∇</mml:mi>\r\n                                      <mml:mo>·</mml:mo>\r\n                                      <mml:mi>u</mml:mi>\r\n                                      <mml:mo>=</mml:mo>\r\n                                      <mml:mn>0</mml:mn>\r\n                                      <mml:mo>,</mml:mo>\r\n                                    </mml:mrow>\r\n                                  </mml:mtd>\r\n                                </mml:mtr>\r\n                              </mml:mtable>\r\n                            </mml:mrow>\r\n                          </mml:mfenced>\r\n                        </mml:mtd>\r\n                      </mml:mtr>\r\n                    </mml:mtable>\r\n                  </mml:mrow>\r\n                </mml:math>\r\n              </jats:alternatives>\r\n            </jats:disp-formula>is considered along with homogeneous Dirichlet boundary conditions in a smoothly bounded planar domain <jats:inline-formula>\r\n              <jats:alternatives>\r\n                <jats:tex-math>$$\\Omega $$</jats:tex-math>\r\n                <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\r\n                  <mml:mi>Ω</mml:mi>\r\n                </mml:math>\r\n              </jats:alternatives>\r\n            </jats:inline-formula>. It is firstly, inter alia, observed that if <jats:inline-formula>\r\n              <jats:alternatives>\r\n                <jats:tex-math>$$T&gt;0$$</jats:tex-math>\r\n                <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\r\n                  <mml:mrow>\r\n                    <mml:mi>T</mml:mi>\r\n                    <mml:mo>&gt;</mml:mo>\r\n                    <mml:mn>0</mml:mn>\r\n                  </mml:mrow>\r\n                </mml:math>\r\n              </jats:alternatives>\r\n            </jats:inline-formula> and <jats:disp-formula>\r\n              <jats:alternatives>\r\n                <jats:tex-math>$$\\begin{aligned} \\int _0^T \\bigg \\{ \\int _\\Omega |f(x,t)| \\cdot \\ln ^\\frac{1}{2} \\big (|f(x,t)|+1\\big ) dx \\bigg \\}^2 dt &lt;\\infty , \\end{aligned}$$</jats:tex-math>\r\n                <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\r\n                  <mml:mrow>\r\n                    <mml:mtable>\r\n                      <mml:mtr>\r\n                        <mml:mtd>\r\n                          <mml:mrow>\r\n                            <mml:msubsup>\r\n                              <mml:mo>∫</mml:mo>\r\n                              <mml:mn>0</mml:mn>\r\n                              <mml:mi>T</mml:mi>\r\n                            </mml:msubsup>\r\n                            <mml:mrow>\r\n                              <mml:mo>{</mml:mo>\r\n                            </mml:mrow>\r\n                            <mml:msub>\r\n                              <mml:mo>∫</mml:mo>\r\n                              <mml:mi>Ω</mml:mi>\r\n                            </mml:msub>\r\n                            <mml:mrow>\r\n                              <mml:mo>|</mml:mo>\r\n                              <mml:mi>f</mml:mi>\r\n                              <mml:mrow>\r\n                                <mml:mo>(</mml:mo>\r\n                                <mml:mi>x</mml:mi>\r\n                                <mml:mo>,</mml:mo>\r\n                                <mml:mi>t</mml:mi>\r\n                                <mml:mo>)</mml:mo>\r\n                              </mml:mrow>\r\n                              <mml:mo>|</mml:mo>\r\n                            </mml:mrow>\r\n                            <mml:mo>·</mml:mo>\r\n                            <mml:msup>\r\n                              <mml:mo>ln</mml:mo>\r\n                              <mml:mfrac>\r\n                                <mml:mn>1</mml:mn>\r\n                                <mml:mn>2</mml:mn>\r\n                              </mml:mfrac>\r\n                            </mml:msup>\r\n                            <mml:mrow>\r\n                              <mml:mo>(</mml:mo>\r\n                            </mml:mrow>\r\n                            <mml:mrow>\r\n                              <mml:mo>|</mml:mo>\r\n                              <mml:mi>f</mml:mi>\r\n                              <mml:mrow>\r\n                                <mml:mo>(</mml:mo>\r\n                                <mml:mi>x</mml:mi>\r\n                                <mml:mo>,</mml:mo>\r\n                                <mml:mi>t</mml:mi>\r\n                                <mml:mo>)</mml:mo>\r\n                              </mml:mrow>\r\n                              <mml:mo>|</mml:mo>\r\n                            </mml:mrow>\r\n                            <mml:mo>+</mml:mo>\r\n                            <mml:mn>1</mml:mn>\r\n                            <mml:mrow>\r\n                              <mml:mo>)</mml:mo>\r\n                            </mml:mrow>\r\n                            <mml:mi>d</mml:mi>\r\n                            <mml:mi>x</mml:mi>\r\n                            <mml:msup>\r\n                              <mml:mrow>\r\n                                <mml:mo>}</mml:mo>\r\n                              </mml:mrow>\r\n                              <mml:mn>2</mml:mn>\r\n                            </mml:msup>\r\n                            <mml:mi>d</mml:mi>\r\n                            <mml:mi>t</mml:mi>\r\n                            <mml:mo>&lt;</mml:mo>\r\n                            <mml:mi>∞</mml:mi>\r\n                            <mml:mo>,</mml:mo>\r\n                          </mml:mrow>\r\n                        </mml:mtd>\r\n                      </mml:mtr>\r\n                    </mml:mtable>\r\n                  </mml:mrow>\r\n                </mml:math>\r\n              </jats:alternatives>\r\n            </jats:disp-formula>then for all divergence-free <jats:inline-formula>\r\n              <jats:alternatives>\r\n                <jats:tex-math>$$u_0\\in L^2(\\Omega ;{\\mathbb {R}}^2)$$</jats:tex-math>\r\n                <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\r\n                  <mml:mrow>\r\n                    <mml:msub>\r\n                      <mml:mi>u</mml:mi>\r\n                      <mml:mn>0</mml:mn>\r\n                    </mml:msub>\r\n                    <mml:mo>∈</mml:mo>\r\n                    <mml:msup>\r\n                      <mml:mi>L</mml:mi>\r\n                      <mml:mn>2</mml:mn>\r\n                    </mml:msup>\r\n                    <mml:mrow>\r\n                      <mml:mo>(</mml:mo>\r\n                      <mml:mi>Ω</mml:mi>\r\n                      <mml:mo>;</mml:mo>\r\n                      <mml:msup>\r\n                        <mml:mrow>\r\n                          <mml:mi>R</mml:mi>\r\n                        </mml:mrow>\r\n                        <mml:mn>2</mml:mn>\r\n                      </mml:msup>\r\n                      <mml:mo>)</mml:mo>\r\n                    </mml:mrow>\r\n                  </mml:mrow>\r\n                </mml:math>\r\n              </jats:alternatives>\r\n            </jats:inline-formula>, a corresponding initial-boundary value problem admits a weak solution <jats:italic>u</jats:italic> with <jats:inline-formula>\r\n              <jats:alternatives>\r\n                <jats:tex-math>$$u|_{t=0}=u_0$$</jats:tex-math>\r\n                <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\r\n                  <mml:mrow>\r\n                    <mml:msub>\r\n                      <mml:mrow>\r\n                        <mml:mi>u</mml:mi>\r\n                        <mml:mo>|</mml:mo>\r\n                      </mml:mrow>\r\n                      <mml:mrow>\r\n                        <mml:mi>t</mml:mi>\r\n                        <mml:mo>=</mml:mo>\r\n                        <mml:mn>0</mml:mn>\r\n                      </mml:mrow>\r\n                    </mml:msub>\r\n                    <mml:mo>=</mml:mo>\r\n                    <mml:msub>\r\n                      <mml:mi>u</mml:mi>\r\n                      <mml:mn>0</mml:mn>\r\n                    </mml:msub>\r\n                  </mml:mrow>\r\n                </mml:math>\r\n              </jats:alternatives>\r\n            </jats:inline-formula>. For any positive and nondecreasing <jats:inline-formula>\r\n              <jats:alternatives>\r\n                <jats:tex-math>$$L\\in C^0([0,\\infty ))$$</jats:tex-math>\r\n                <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\r\n                  <mml:mrow>\r\n                    <mml:mi>L</mml:mi>\r\n                    <mml:mo>∈</mml:mo>\r\n                    <mml:msup>\r\n                      <mml:mi>C</mml:mi>\r\n                      <mml:mn>0</mml:mn>\r\n                    </mml:msup>\r\n                    <mml:mrow>\r\n                      <mml:mo>(</mml:mo>\r\n                      <mml:mrow>\r\n                        <mml:mo>[</mml:mo>\r\n                        <mml:mn>0</mml:mn>\r\n                        <mml:mo>,</mml:mo>\r\n                        <mml:mi>∞</mml:mi>\r\n                        <mml:mo>)</mml:mo>\r\n                      </mml:mrow>\r\n                      <mml:mo>)</mml:mo>\r\n                    </mml:mrow>\r\n                  </mml:mrow>\r\n                </mml:math>\r\n              </jats:alternatives>\r\n            </jats:inline-formula> such that <jats:disp-formula>\r\n              <jats:alternatives>\r\n                <jats:tex-math>$$\\begin{aligned} \\frac{L(\\xi )}{\\ln ^\\frac{1}{2} \\xi } \\rightarrow 0 \\qquad \\text{ as } \\xi \\rightarrow \\infty , \\end{aligned}$$</jats:tex-math>\r\n                <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\r\n                  <mml:mrow>\r\n                    <mml:mtable>\r\n                      <mml:mtr>\r\n                        <mml:mtd>\r\n                          <mml:mrow>\r\n                            <mml:mfrac>\r\n                              <mml:mrow>\r\n                                <mml:mi>L</mml:mi>\r\n                                <mml:mo>(</mml:mo>\r\n                                <mml:mi>ξ</mml:mi>\r\n                                <mml:mo>)</mml:mo>\r\n                              </mml:mrow>\r\n                              <mml:mrow>\r\n                                <mml:msup>\r\n                                  <mml:mo>ln</mml:mo>\r\n                                  <mml:mfrac>\r\n                                    <mml:mn>1</mml:mn>\r\n                                    <mml:mn>2</mml:mn>\r\n                                  </mml:mfrac>\r\n                                </mml:msup>\r\n                                <mml:mi>ξ</mml:mi>\r\n                              </mml:mrow>\r\n                            </mml:mfrac>\r\n                            <mml:mo>→</mml:mo>\r\n                            <mml:mn>0</mml:mn>\r\n                            <mml:mspace/>\r\n                            <mml:mspace/>\r\n                            <mml:mtext>as</mml:mtext>\r\n                            <mml:mspace/>\r\n                            <mml:mi>ξ</mml:mi>\r\n                            <mml:mo>→</mml:mo>\r\n                            <mml:mi>∞</mml:mi>\r\n                            <mml:mo>,</mml:mo>\r\n                          </mml:mrow>\r\n                        </mml:mtd>\r\n                      </mml:mtr>\r\n                    </mml:mtable>\r\n                  </mml:mrow>\r\n                </mml:math>\r\n              </jats:alternatives>\r\n            </jats:disp-formula>this is complemented by a statement on nonexistence of such a solution in the presence of smooth initial data and a suitably constructed <jats:inline-formula>\r\n              <jats:alternatives>\r\n                <jats:tex-math>$$f:\\Omega \\times (0,T)\\rightarrow {\\mathbb {R}}^2$$</jats:tex-math>\r\n                <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\r\n                  <mml:mrow>\r\n                    <mml:mi>f</mml:mi>\r\n                    <mml:mo>:</mml:mo>\r\n                    <mml:mi>Ω</mml:mi>\r\n                    <mml:mo>×</mml:mo>\r\n                    <mml:mrow>\r\n                      <mml:mo>(</mml:mo>\r\n                      <mml:mn>0</mml:mn>\r\n                      <mml:mo>,</mml:mo>\r\n                      <mml:mi>T</mml:mi>\r\n                      <mml:mo>)</mml:mo>\r\n                    </mml:mrow>\r\n                    <mml:mo>→</mml:mo>\r\n                    <mml:msup>\r\n                      <mml:mrow>\r\n                        <mml:mi>R</mml:mi>\r\n                      </mml:mrow>\r\n                      <mml:mn>2</mml:mn>\r\n                    </mml:msup>\r\n                  </mml:mrow>\r\n                </mml:math>\r\n              </jats:alternatives>\r\n            </jats:inline-formula> fulfilling <jats:disp-formula>\r\n              <jats:alternatives>\r\n                <jats:tex-math>$$\\begin{aligned} \\int _0^T \\bigg \\{ \\int _\\Omega |f(x,t)| \\cdot L\\big (|f(x,t)|\\big ) dx \\bigg \\}^2 dt &lt; \\infty . \\end{aligned}$$</jats:tex-math>\r\n                <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\r\n                  <mml:mrow>\r\n                    <mml:mtable>\r\n                      <mml:mtr>\r\n                        <mml:mtd>\r\n                          <mml:mrow>\r\n                            <mml:msubsup>\r\n                              <mml:mo>∫</mml:mo>\r\n                              <mml:mn>0</mml:mn>\r\n                              <mml:mi>T</mml:mi>\r\n                            </mml:msubsup>\r\n                            <mml:mrow>\r\n                              <mml:mo>{</mml:mo>\r\n                            </mml:mrow>\r\n                            <mml:msub>\r\n                              <mml:mo>∫</mml:mo>\r\n                              <mml:mi>Ω</mml:mi>\r\n                            </mml:msub>\r\n                            <mml:mrow>\r\n                              <mml:mo>|</mml:mo>\r\n                              <mml:mi>f</mml:mi>\r\n                              <mml:mrow>\r\n                                <mml:mo>(</mml:mo>\r\n                                <mml:mi>x</mml:mi>\r\n                                <mml:mo>,</mml:mo>\r\n                                <mml:mi>t</mml:mi>\r\n                                <mml:mo>)</mml:mo>\r\n                              </mml:mrow>\r\n                              <mml:mo>|</mml:mo>\r\n                            </mml:mrow>\r\n                            <mml:mo>·</mml:mo>\r\n                            <mml:mrow>\r\n                              <mml:mi>L</mml:mi>\r\n                              <mml:mrow>\r\n                                <mml:mo>(</mml:mo>\r\n                              </mml:mrow>\r\n                              <mml:mo>|</mml:mo>\r\n                              <mml:mi>f</mml:mi>\r\n                              <mml:mrow>\r\n                                <mml:mo>(</mml:mo>\r\n                                <mml:mi>x</mml:mi>\r\n                                <mml:mo>,</mml:mo>\r\n                                <mml:mi>t</mml:mi>\r\n                                <mml:mo>)</mml:mo>\r\n                              </mml:mrow>\r\n                              <mml:mo>|</mml:mo>\r\n                              <mml:mrow>\r\n                                <mml:mo>)</mml:mo>\r\n                              </mml:mrow>\r\n                              <mml:mi>d</mml:mi>\r\n                              <mml:mi>x</mml:mi>\r\n                            </mml:mrow>\r\n                            <mml:msup>\r\n                              <mml:mrow>\r\n                                <mml:mo>}</mml:mo>\r\n                              </mml:mrow>\r\n                              <mml:mn>2</mml:mn>\r\n                            </mml:msup>\r\n                            <mml:mi>d</mml:mi>\r\n                            <mml:mi>t</mml:mi>\r\n                            <mml:mo>&lt;</mml:mo>\r\n                            <mml:mi>∞</mml:mi>\r\n                            <mml:mo>.</mml:mo>\r\n                          </mml:mrow>\r\n                        </mml:mtd>\r\n                      </mml:mtr>\r\n                    </mml:mtable>\r\n                  </mml:mrow>\r\n                </mml:math>\r\n              </jats:alternatives>\r\n            </jats:disp-formula>This resolves a fine structure in the borderline case <jats:inline-formula>\r\n              <jats:alternatives>\r\n                <jats:tex-math>$$p=1$$</jats:tex-math>\r\n                <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\r\n                  <mml:mrow>\r\n                    <mml:mi>p</mml:mi>\r\n                    <mml:mo>=</mml:mo>\r\n                    <mml:mn>1</mml:mn>\r\n                  </mml:mrow>\r\n                </mml:math>\r\n              </jats:alternatives>\r\n            </jats:inline-formula> and <jats:inline-formula>\r\n              <jats:alternatives>\r\n                <jats:tex-math>$$q=2$$</jats:tex-math>\r\n                <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\r\n                  <mml:mrow>\r\n                    <mml:mi>q</mml:mi>\r\n                    <mml:mo>=</mml:mo>\r\n                    <mml:mn>2</mml:mn>\r\n                  </mml:mrow>\r\n                </mml:math>\r\n              </jats:alternatives>\r\n            </jats:inline-formula> appearing in results on existence of weak solutions for sources in <jats:inline-formula>\r\n              <jats:alternatives>\r\n                <jats:tex-math>$$L^q((0,T);L^p(\\Omega ;{\\mathbb {R}}^2))$$</jats:tex-math>\r\n                <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\r\n                  <mml:mrow>\r\n                    <mml:msup>\r\n                      <mml:mi>L</mml:mi>\r\n                      <mml:mi>q</mml:mi>\r\n                    </mml:msup>\r\n                    <mml:mrow>\r\n                      <mml:mo>(</mml:mo>\r\n                      <mml:mrow>\r\n                        <mml:mo>(</mml:mo>\r\n                        <mml:mn>0</mml:mn>\r\n                        <mml:mo>,</mml:mo>\r\n                        <mml:mi>T</mml:mi>\r\n                        <mml:mo>)</mml:mo>\r\n                      </mml:mrow>\r\n                      <mml:mo>;</mml:mo>\r\n                      <mml:msup>\r\n                        <mml:mi>L</mml:mi>\r\n                        <mml:mi>p</mml:mi>\r\n                      </mml:msup>\r\n                      <mml:mrow>\r\n                        <mml:mo>(</mml:mo>\r\n                        <mml:mi>Ω</mml:mi>\r\n                        <mml:mo>;</mml:mo>\r\n                        <mml:msup>\r\n                          <mml:mrow>\r\n                            <mml:mi>R</mml:mi>\r\n                          </mml:mrow>\r\n                          <mml:mn>2</mml:mn>\r\n                        </mml:msup>\r\n                        <mml:mo>)</mml:mo>\r\n                      </mml:mrow>\r\n                      <mml:mo>)</mml:mo>\r\n                    </mml:mrow>\r\n                  </mml:mrow>\r\n                </mml:math>\r\n              </jats:alternatives>\r\n            </jats:inline-formula> when <jats:inline-formula>\r\n              <jats:alternatives>\r\n                <jats:tex-math>$$p\\in (1,\\infty ]$$</jats:tex-math>\r\n                <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\r\n                  <mml:mrow>\r\n                    <mml:mi>p</mml:mi>\r\n                    <mml:mo>∈</mml:mo>\r\n                    <mml:mo>(</mml:mo>\r\n                    <mml:mn>1</mml:mn>\r\n                    <mml:mo>,</mml:mo>\r\n                    <mml:mi>∞</mml:mi>\r\n                    <mml:mo>]</mml:mo>\r\n                  </mml:mrow>\r\n                </mml:math>\r\n              </jats:alternatives>\r\n            </jats:inline-formula> and <jats:inline-formula>\r\n              <jats:alternatives>\r\n                <jats:tex-math>$$q\\in [1,\\infty ]$$</jats:tex-math>\r\n                <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\r\n                  <mml:mrow>\r\n                    <mml:mi>q</mml:mi>\r\n                    <mml:mo>∈</mml:mo>\r\n                    <mml:mo>[</mml:mo>\r\n                    <mml:mn>1</mml:mn>\r\n                    <mml:mo>,</mml:mo>\r\n                    <mml:mi>∞</mml:mi>\r\n                    <mml:mo>]</mml:mo>\r\n                  </mml:mrow>\r\n                </mml:math>\r\n              </jats:alternatives>\r\n            </jats:inline-formula> satisfy <jats:inline-formula>\r\n              <jats:alternatives>\r\n                <jats:tex-math>$$\\frac{1}{p}+\\frac{1}{q}\\le \\frac{3}{2}$$</jats:tex-math>\r\n                <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\r\n                  <mml:mrow>\r\n                    <mml:mfrac>\r\n                      <mml:mn>1</mml:mn>\r\n                      <mml:mi>p</mml:mi>\r\n                    </mml:mfrac>\r\n                    <mml:mo>+</mml:mo>\r\n                    <mml:mfrac>\r\n                      <mml:mn>1</mml:mn>\r\n                      <mml:mi>q</mml:mi>\r\n                    </mml:mfrac>\r\n                    <mml:mo>≤</mml:mo>\r\n                    <mml:mfrac>\r\n                      <mml:mn>3</mml:mn>\r\n                      <mml:mn>2</mml:mn>\r\n                    </mml:mfrac>\r\n                  </mml:mrow>\r\n                </mml:math>\r\n              </jats:alternatives>\r\n            </jats:inline-formula>, and on nonexistence if here <jats:inline-formula>\r\n              <jats:alternatives>\r\n                <jats:tex-math>$$p\\in [1,\\infty )$$</jats:tex-math>\r\n                <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\r\n                  <mml:mrow>\r\n                    <mml:mi>p</mml:mi>\r\n                    <mml:mo>∈</mml:mo>\r\n                    <mml:mo>[</mml:mo>\r\n                    <mml:mn>1</mml:mn>\r\n                    <mml:mo>,</mml:mo>\r\n                    <mml:mi>∞</mml:mi>\r\n                    <mml:mo>)</mml:mo>\r\n                  </mml:mrow>\r\n                </mml:math>\r\n              </jats:alternatives>\r\n            </jats:inline-formula> and <jats:inline-formula>\r\n              <jats:alternatives>\r\n                <jats:tex-math>$$q\\in [1,\\infty )$$</jats:tex-math>\r\n                <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\r\n                  <mml:mrow>\r\n                    <mml:mi>q</mml:mi>\r\n                    <mml:mo>∈</mml:mo>\r\n                    <mml:mo>[</mml:mo>\r\n                    <mml:mn>1</mml:mn>\r\n                    <mml:mo>,</mml:mo>\r\n                    <mml:mi>∞</mml:mi>\r\n                    <mml:mo>)</mml:mo>\r\n                  </mml:mrow>\r\n                </mml:math>\r\n              </jats:alternatives>\r\n            </jats:inline-formula> are such that <jats:inline-formula>\r\n              <jats:alternatives>\r\n                <jats:tex-math>$$\\frac{1}{p}+\\frac{1}{q}&gt;\\frac{3}{2}$$</jats:tex-math>\r\n                <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\r\n                  <mml:mrow>\r\n                    <mml:mfrac>\r\n                      <mml:mn>1</mml:mn>\r\n                      <mml:mi>p</mml:mi>\r\n                    </mml:mfrac>\r\n                    <mml:mo>+</mml:mo>\r\n                    <mml:mfrac>\r\n                      <mml:mn>1</mml:mn>\r\n                      <mml:mi>q</mml:mi>\r\n                    </mml:mfrac>\r\n                    <mml:mo>&gt;</mml:mo>\r\n                    <mml:mfrac>\r\n                      <mml:mn>3</mml:mn>\r\n                      <mml:mn>2</mml:mn>\r\n                    </mml:mfrac>\r\n                  </mml:mrow>\r\n                </mml:math>\r\n              </jats:alternatives>\r\n            </jats:inline-formula>.</jats:p>"}],"publication":"Mathematische Annalen","type":"journal_article","doi":"10.1007/s00208-024-02987-6","title":"Externally forced blow-up and optimal spaces for source regularity in the two-dimensional Navier–Stokes system","volume":391,"date_created":"2025-12-18T19:02:09Z","author":[{"first_name":"Michael","last_name":"Winkler","id":"31496","full_name":"Winkler, Michael"}],"publisher":"Springer Science and Business Media LLC","date_updated":"2025-12-18T20:13:05Z","intvolume":"       391","page":"3023-3054","citation":{"apa":"Winkler, M. (2024). Externally forced blow-up and optimal spaces for source regularity in the two-dimensional Navier–Stokes system. <i>Mathematische Annalen</i>, <i>391</i>(2), 3023–3054. <a href=\"https://doi.org/10.1007/s00208-024-02987-6\">https://doi.org/10.1007/s00208-024-02987-6</a>","short":"M. Winkler, Mathematische Annalen 391 (2024) 3023–3054.","mla":"Winkler, Michael. “Externally Forced Blow-up and Optimal Spaces for Source Regularity in the Two-Dimensional Navier–Stokes System.” <i>Mathematische Annalen</i>, vol. 391, no. 2, Springer Science and Business Media LLC, 2024, pp. 3023–54, doi:<a href=\"https://doi.org/10.1007/s00208-024-02987-6\">10.1007/s00208-024-02987-6</a>.","bibtex":"@article{Winkler_2024, title={Externally forced blow-up and optimal spaces for source regularity in the two-dimensional Navier–Stokes system}, volume={391}, DOI={<a href=\"https://doi.org/10.1007/s00208-024-02987-6\">10.1007/s00208-024-02987-6</a>}, number={2}, journal={Mathematische Annalen}, publisher={Springer Science and Business Media LLC}, author={Winkler, Michael}, year={2024}, pages={3023–3054} }","ieee":"M. Winkler, “Externally forced blow-up and optimal spaces for source regularity in the two-dimensional Navier–Stokes system,” <i>Mathematische Annalen</i>, vol. 391, no. 2, pp. 3023–3054, 2024, doi: <a href=\"https://doi.org/10.1007/s00208-024-02987-6\">10.1007/s00208-024-02987-6</a>.","chicago":"Winkler, Michael. “Externally Forced Blow-up and Optimal Spaces for Source Regularity in the Two-Dimensional Navier–Stokes System.” <i>Mathematische Annalen</i> 391, no. 2 (2024): 3023–54. <a href=\"https://doi.org/10.1007/s00208-024-02987-6\">https://doi.org/10.1007/s00208-024-02987-6</a>.","ama":"Winkler M. Externally forced blow-up and optimal spaces for source regularity in the two-dimensional Navier–Stokes system. <i>Mathematische Annalen</i>. 2024;391(2):3023-3054. doi:<a href=\"https://doi.org/10.1007/s00208-024-02987-6\">10.1007/s00208-024-02987-6</a>"},"year":"2024","issue":"2","publication_identifier":{"issn":["0025-5831","1432-1807"]},"publication_status":"published"},{"date_updated":"2026-02-19T13:25:52Z","publisher":"Springer Science and Business Media LLC","volume":387,"date_created":"2026-02-19T13:24:21Z","author":[{"first_name":"Job J.","full_name":"Kuit, Job J.","last_name":"Kuit"},{"first_name":"Eitan","full_name":"Sayag, Eitan","last_name":"Sayag"}],"title":"On the little Weyl group of a real spherical space","doi":"10.1007/s00208-022-02473-x","publication_identifier":{"issn":["0025-5831","1432-1807"]},"publication_status":"published","issue":"1-2","year":"2022","intvolume":"       387","page":"433-498","citation":{"bibtex":"@article{Kuit_Sayag_2022, title={On the little Weyl group of a real spherical space}, volume={387}, DOI={<a href=\"https://doi.org/10.1007/s00208-022-02473-x\">10.1007/s00208-022-02473-x</a>}, number={1–2}, journal={Mathematische Annalen}, publisher={Springer Science and Business Media LLC}, author={Kuit, Job J. and Sayag, Eitan}, year={2022}, pages={433–498} }","mla":"Kuit, Job J., and Eitan Sayag. “On the Little Weyl Group of a Real Spherical Space.” <i>Mathematische Annalen</i>, vol. 387, no. 1–2, Springer Science and Business Media LLC, 2022, pp. 433–98, doi:<a href=\"https://doi.org/10.1007/s00208-022-02473-x\">10.1007/s00208-022-02473-x</a>.","short":"J.J. Kuit, E. Sayag, Mathematische Annalen 387 (2022) 433–498.","apa":"Kuit, J. J., &#38; Sayag, E. (2022). On the little Weyl group of a real spherical space. <i>Mathematische Annalen</i>, <i>387</i>(1–2), 433–498. <a href=\"https://doi.org/10.1007/s00208-022-02473-x\">https://doi.org/10.1007/s00208-022-02473-x</a>","ieee":"J. J. Kuit and E. Sayag, “On the little Weyl group of a real spherical space,” <i>Mathematische Annalen</i>, vol. 387, no. 1–2, pp. 433–498, 2022, doi: <a href=\"https://doi.org/10.1007/s00208-022-02473-x\">10.1007/s00208-022-02473-x</a>.","chicago":"Kuit, Job J., and Eitan Sayag. “On the Little Weyl Group of a Real Spherical Space.” <i>Mathematische Annalen</i> 387, no. 1–2 (2022): 433–98. <a href=\"https://doi.org/10.1007/s00208-022-02473-x\">https://doi.org/10.1007/s00208-022-02473-x</a>.","ama":"Kuit JJ, Sayag E. On the little Weyl group of a real spherical space. <i>Mathematische Annalen</i>. 2022;387(1-2):433-498. doi:<a href=\"https://doi.org/10.1007/s00208-022-02473-x\">10.1007/s00208-022-02473-x</a>"},"_id":"64272","user_id":"52730","language":[{"iso":"eng"}],"publication":"Mathematische Annalen","type":"journal_article","abstract":[{"lang":"eng","text":"<jats:title>Abstract</jats:title><jats:p>In the present paper we further the study of the compression cone of a real spherical homogeneous space <jats:inline-formula><jats:alternatives><jats:tex-math>$$Z=G/H$$</jats:tex-math><mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\r\n                  <mml:mrow>\r\n                    <mml:mi>Z</mml:mi>\r\n                    <mml:mo>=</mml:mo>\r\n                    <mml:mi>G</mml:mi>\r\n                    <mml:mo>/</mml:mo>\r\n                    <mml:mi>H</mml:mi>\r\n                  </mml:mrow>\r\n                </mml:math></jats:alternatives></jats:inline-formula>. In particular we provide a geometric construction of the little Weyl group of <jats:italic>Z</jats:italic> introduced recently by Knop and Krötz. Our technique is based on a fine analysis of limits of conjugates of the subalgebra <jats:inline-formula><jats:alternatives><jats:tex-math>$$\\mathrm{Lie}(H)$$</jats:tex-math><mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\r\n                  <mml:mrow>\r\n                    <mml:mi>Lie</mml:mi>\r\n                    <mml:mo>(</mml:mo>\r\n                    <mml:mi>H</mml:mi>\r\n                    <mml:mo>)</mml:mo>\r\n                  </mml:mrow>\r\n                </mml:math></jats:alternatives></jats:inline-formula> along one-parameter subgroups in the Grassmannian of subspaces of <jats:inline-formula><jats:alternatives><jats:tex-math>$$\\mathrm{Lie}(G)$$</jats:tex-math><mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\">\r\n                  <mml:mrow>\r\n                    <mml:mi>Lie</mml:mi>\r\n                    <mml:mo>(</mml:mo>\r\n                    <mml:mi>G</mml:mi>\r\n                    <mml:mo>)</mml:mo>\r\n                  </mml:mrow>\r\n                </mml:math></jats:alternatives></jats:inline-formula>. The little Weyl group is obtained as a finite reflection group generated by the reflections in the walls of the compression cone.</jats:p>"}],"status":"public"},{"publication":"Mathematische Annalen","type":"journal_article","status":"public","_id":"63361","user_id":"31496","language":[{"iso":"eng"}],"publication_identifier":{"issn":["0025-5831","1432-1807"]},"publication_status":"published","issue":"3-4","year":"2018","intvolume":"       373","page":"1237-1282","citation":{"apa":"Winkler, M. (2018). How unstable is spatial homogeneity in Keller-Segel systems? A new critical mass phenomenon in two- and higher-dimensional parabolic-elliptic cases. <i>Mathematische Annalen</i>, <i>373</i>(3–4), 1237–1282. <a href=\"https://doi.org/10.1007/s00208-018-1722-8\">https://doi.org/10.1007/s00208-018-1722-8</a>","bibtex":"@article{Winkler_2018, title={How unstable is spatial homogeneity in Keller-Segel systems? A new critical mass phenomenon in two- and higher-dimensional parabolic-elliptic cases}, volume={373}, DOI={<a href=\"https://doi.org/10.1007/s00208-018-1722-8\">10.1007/s00208-018-1722-8</a>}, number={3–4}, journal={Mathematische Annalen}, publisher={Springer Science and Business Media LLC}, author={Winkler, Michael}, year={2018}, pages={1237–1282} }","mla":"Winkler, Michael. “How Unstable Is Spatial Homogeneity in Keller-Segel Systems? A New Critical Mass Phenomenon in Two- and Higher-Dimensional Parabolic-Elliptic Cases.” <i>Mathematische Annalen</i>, vol. 373, no. 3–4, Springer Science and Business Media LLC, 2018, pp. 1237–82, doi:<a href=\"https://doi.org/10.1007/s00208-018-1722-8\">10.1007/s00208-018-1722-8</a>.","short":"M. Winkler, Mathematische Annalen 373 (2018) 1237–1282.","ama":"Winkler M. How unstable is spatial homogeneity in Keller-Segel systems? A new critical mass phenomenon in two- and higher-dimensional parabolic-elliptic cases. <i>Mathematische Annalen</i>. 2018;373(3-4):1237-1282. doi:<a href=\"https://doi.org/10.1007/s00208-018-1722-8\">10.1007/s00208-018-1722-8</a>","chicago":"Winkler, Michael. “How Unstable Is Spatial Homogeneity in Keller-Segel Systems? A New Critical Mass Phenomenon in Two- and Higher-Dimensional Parabolic-Elliptic Cases.” <i>Mathematische Annalen</i> 373, no. 3–4 (2018): 1237–82. <a href=\"https://doi.org/10.1007/s00208-018-1722-8\">https://doi.org/10.1007/s00208-018-1722-8</a>.","ieee":"M. Winkler, “How unstable is spatial homogeneity in Keller-Segel systems? A new critical mass phenomenon in two- and higher-dimensional parabolic-elliptic cases,” <i>Mathematische Annalen</i>, vol. 373, no. 3–4, pp. 1237–1282, 2018, doi: <a href=\"https://doi.org/10.1007/s00208-018-1722-8\">10.1007/s00208-018-1722-8</a>."},"publisher":"Springer Science and Business Media LLC","date_updated":"2025-12-19T10:58:06Z","volume":373,"date_created":"2025-12-19T10:57:59Z","author":[{"last_name":"Winkler","full_name":"Winkler, Michael","id":"31496","first_name":"Michael"}],"title":"How unstable is spatial homogeneity in Keller-Segel systems? A new critical mass phenomenon in two- and higher-dimensional parabolic-elliptic cases","doi":"10.1007/s00208-018-1722-8"},{"external_id":{"arxiv":["1605.08801"]},"language":[{"iso":"eng"}],"keyword":["General Mathematics"],"publication":"Mathematische Annalen","date_created":"2022-05-17T12:09:43Z","publisher":"Springer Science and Business Media LLC","title":"Classical and quantum resonances for hyperbolic surfaces","issue":"3-4","year":"2017","department":[{"_id":"10"},{"_id":"623"},{"_id":"548"},{"_id":"91"}],"user_id":"49063","_id":"31267","type":"journal_article","status":"public","volume":370,"author":[{"last_name":"Guillarmou","full_name":"Guillarmou, Colin","first_name":"Colin"},{"last_name":"Hilgert","id":"220","full_name":"Hilgert, Joachim","first_name":"Joachim"},{"last_name":"Weich","orcid":"0000-0002-9648-6919","full_name":"Weich, Tobias","id":"49178","first_name":"Tobias"}],"date_updated":"2024-02-19T06:18:21Z","doi":"10.1007/s00208-017-1576-5","publication_identifier":{"issn":["0025-5831","1432-1807"]},"publication_status":"published","intvolume":"       370","page":"1231-1275","citation":{"ama":"Guillarmou C, Hilgert J, Weich T. Classical and quantum resonances for hyperbolic surfaces. <i>Mathematische Annalen</i>. 2017;370(3-4):1231-1275. doi:<a href=\"https://doi.org/10.1007/s00208-017-1576-5\">10.1007/s00208-017-1576-5</a>","ieee":"C. Guillarmou, J. Hilgert, and T. Weich, “Classical and quantum resonances for hyperbolic surfaces,” <i>Mathematische Annalen</i>, vol. 370, no. 3–4, pp. 1231–1275, 2017, doi: <a href=\"https://doi.org/10.1007/s00208-017-1576-5\">10.1007/s00208-017-1576-5</a>.","chicago":"Guillarmou, Colin, Joachim Hilgert, and Tobias Weich. “Classical and Quantum Resonances for Hyperbolic Surfaces.” <i>Mathematische Annalen</i> 370, no. 3–4 (2017): 1231–75. <a href=\"https://doi.org/10.1007/s00208-017-1576-5\">https://doi.org/10.1007/s00208-017-1576-5</a>.","apa":"Guillarmou, C., Hilgert, J., &#38; Weich, T. (2017). Classical and quantum resonances for hyperbolic surfaces. <i>Mathematische Annalen</i>, <i>370</i>(3–4), 1231–1275. <a href=\"https://doi.org/10.1007/s00208-017-1576-5\">https://doi.org/10.1007/s00208-017-1576-5</a>","short":"C. Guillarmou, J. Hilgert, T. Weich, Mathematische Annalen 370 (2017) 1231–1275.","mla":"Guillarmou, Colin, et al. “Classical and Quantum Resonances for Hyperbolic Surfaces.” <i>Mathematische Annalen</i>, vol. 370, no. 3–4, Springer Science and Business Media LLC, 2017, pp. 1231–75, doi:<a href=\"https://doi.org/10.1007/s00208-017-1576-5\">10.1007/s00208-017-1576-5</a>.","bibtex":"@article{Guillarmou_Hilgert_Weich_2017, title={Classical and quantum resonances for hyperbolic surfaces}, volume={370}, DOI={<a href=\"https://doi.org/10.1007/s00208-017-1576-5\">10.1007/s00208-017-1576-5</a>}, number={3–4}, journal={Mathematische Annalen}, publisher={Springer Science and Business Media LLC}, author={Guillarmou, Colin and Hilgert, Joachim and Weich, Tobias}, year={2017}, pages={1231–1275} }"}},{"keyword":["General Mathematics"],"article_type":"original","language":[{"iso":"eng"}],"extern":"1","_id":"53189","user_id":"81636","status":"public","publication":"Mathematische Annalen","type":"journal_article","title":"Rational structures on automorphic representations","doi":"10.1007/s00208-017-1567-6","date_updated":"2024-04-03T17:12:59Z","publisher":"Springer Science and Business Media LLC","volume":370,"date_created":"2024-04-03T16:54:45Z","author":[{"id":"81636","full_name":"Januszewski, Fabian","last_name":"Januszewski","first_name":"Fabian"}],"year":"2017","page":"1805-1881","intvolume":"       370","citation":{"mla":"Januszewski, Fabian. “Rational Structures on Automorphic Representations.” <i>Mathematische Annalen</i>, vol. 370, no. 3–4, Springer Science and Business Media LLC, 2017, pp. 1805–81, doi:<a href=\"https://doi.org/10.1007/s00208-017-1567-6\">10.1007/s00208-017-1567-6</a>.","short":"F. Januszewski, Mathematische Annalen 370 (2017) 1805–1881.","bibtex":"@article{Januszewski_2017, title={Rational structures on automorphic representations}, volume={370}, DOI={<a href=\"https://doi.org/10.1007/s00208-017-1567-6\">10.1007/s00208-017-1567-6</a>}, number={3–4}, journal={Mathematische Annalen}, publisher={Springer Science and Business Media LLC}, author={Januszewski, Fabian}, year={2017}, pages={1805–1881} }","apa":"Januszewski, F. (2017). Rational structures on automorphic representations. <i>Mathematische Annalen</i>, <i>370</i>(3–4), 1805–1881. <a href=\"https://doi.org/10.1007/s00208-017-1567-6\">https://doi.org/10.1007/s00208-017-1567-6</a>","ieee":"F. Januszewski, “Rational structures on automorphic representations,” <i>Mathematische Annalen</i>, vol. 370, no. 3–4, pp. 1805–1881, 2017, doi: <a href=\"https://doi.org/10.1007/s00208-017-1567-6\">10.1007/s00208-017-1567-6</a>.","chicago":"Januszewski, Fabian. “Rational Structures on Automorphic Representations.” <i>Mathematische Annalen</i> 370, no. 3–4 (2017): 1805–81. <a href=\"https://doi.org/10.1007/s00208-017-1567-6\">https://doi.org/10.1007/s00208-017-1567-6</a>.","ama":"Januszewski F. Rational structures on automorphic representations. <i>Mathematische Annalen</i>. 2017;370(3-4):1805-1881. doi:<a href=\"https://doi.org/10.1007/s00208-017-1567-6\">10.1007/s00208-017-1567-6</a>"},"publication_identifier":{"issn":["0025-5831","1432-1807"]},"publication_status":"published","issue":"3-4"}]
