{"language":[{"iso":"eng"}],"intvolume":" 74","issue":"1","date_updated":"2024-04-07T12:46:28Z","title":"Global generalized solvability in a strongly degenerate taxis-type parabolic system modeling migration–consumption interaction","publication":"Zeitschrift für angewandte Mathematik und Physik","abstract":[{"lang":"eng","text":"AbstractThe parabolic problem $$\\begin{aligned} \\left\\{ \\begin{array}{l} u_t=\\Delta \\big (u\\phi (v)\\big ), \\\\ v_t=\\Delta v-uv, \\end{array} \\right. \\end{aligned}$$\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n u\r\n t\r\n \r\n =\r\n Δ\r\n \r\n (\r\n \r\n u\r\n ϕ\r\n \r\n (\r\n v\r\n )\r\n \r\n \r\n )\r\n \r\n ,\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n v\r\n t\r\n \r\n =\r\n Δ\r\n v\r\n -\r\n u\r\n v\r\n ,\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n is considered in smoothly bounded subdomains of $${\\mathbb {R}}^n$$\r\n \r\n \r\n R\r\n \r\n n\r\n \r\n with arbitrary $$n\\ge 1$$\r\n \r\n n\r\n ≥\r\n 1\r\n \r\n . Under the assumptions that $$\\phi \\in C^0([0,\\infty )) \\cap C^3((0,\\infty ))$$\r\n \r\n ϕ\r\n ∈\r\n \r\n C\r\n 0\r\n \r\n \r\n (\r\n \r\n [\r\n 0\r\n ,\r\n ∞\r\n )\r\n \r\n )\r\n \r\n ∩\r\n \r\n C\r\n 3\r\n \r\n \r\n (\r\n \r\n (\r\n 0\r\n ,\r\n ∞\r\n )\r\n \r\n )\r\n \r\n \r\n is positive on $$(0,\\infty )$$\r\n \r\n (\r\n 0\r\n ,\r\n ∞\r\n )\r\n \r\n and satisfies $$\\begin{aligned} \\liminf _{\\xi \\searrow 0} \\frac{\\phi (\\xi )}{\\xi ^\\alpha }>0 \\quad {\\text{ and }} \\quad \\limsup _{\\xi \\searrow 0} \\big \\{ \\xi ^\\beta |\\phi '(\\xi )| \\big \\}<\\infty \\end{aligned}$$\r\n \r\n \r\n \r\n \r\n \r\n \r\n lim inf\r\n \r\n ξ\r\n ↘\r\n 0\r\n \r\n \r\n \r\n \r\n ϕ\r\n (\r\n ξ\r\n )\r\n \r\n \r\n ξ\r\n α\r\n \r\n \r\n >\r\n 0\r\n \r\n \r\n \r\n and\r\n \r\n \r\n \r\n \r\n lim sup\r\n \r\n ξ\r\n ↘\r\n 0\r\n \r\n \r\n \r\n {\r\n \r\n \r\n ξ\r\n β\r\n \r\n \r\n |\r\n \r\n ϕ\r\n ′\r\n \r\n \r\n (\r\n ξ\r\n )\r\n \r\n |\r\n \r\n \r\n }\r\n \r\n <\r\n ∞\r\n \r\n \r\n \r\n \r\n \r\n with some $$\\alpha >0$$\r\n \r\n α\r\n >\r\n 0\r\n \r\n and $$\\beta >0$$\r\n \r\n β\r\n >\r\n 0\r\n \r\n , for all reasonably regular initial data an associated no-flux type initial-boundary value problem is shown to admit a global solution in an appropriately generalized sense. This extends previously developed solution theories on problems of this form, which either concentrated on non-degenerate or weakly degenerate cases corresponding to the choices $$\\alpha =0$$\r\n \r\n α\r\n =\r\n 0\r\n \r\n and $$\\alpha \\in (0,2)$$\r\n \r\n α\r\n ∈\r\n (\r\n 0\r\n ,\r\n 2\r\n )\r\n \r\n , or were restricted to low-dimensional settings by requiring that $$n\\le 2$$\r\n \r\n n\r\n ≤\r\n 2\r\n \r\n ."}],"_id":"53334","status":"public","doi":"10.1007/s00033-022-01925-3","date_created":"2024-04-07T12:46:23Z","publication_status":"published","year":"2023","author":[{"last_name":"Winkler","full_name":"Winkler, Michael","first_name":"Michael"}],"publication_identifier":{"issn":["0044-2275","1420-9039"]},"user_id":"31496","article_number":"32","citation":{"ieee":"M. Winkler, “Global generalized solvability in a strongly degenerate taxis-type parabolic system modeling migration–consumption interaction,” Zeitschrift für angewandte Mathematik und Physik, vol. 74, no. 1, Art. no. 32, 2023, doi: 10.1007/s00033-022-01925-3.","bibtex":"@article{Winkler_2023, title={Global generalized solvability in a strongly degenerate taxis-type parabolic system modeling migration–consumption interaction}, volume={74}, DOI={10.1007/s00033-022-01925-3}, number={132}, journal={Zeitschrift für angewandte Mathematik und Physik}, publisher={Springer Science and Business Media LLC}, author={Winkler, Michael}, year={2023} }","ama":"Winkler M. Global generalized solvability in a strongly degenerate taxis-type parabolic system modeling migration–consumption interaction. Zeitschrift für angewandte Mathematik und Physik. 2023;74(1). doi:10.1007/s00033-022-01925-3","short":"M. Winkler, Zeitschrift Für Angewandte Mathematik Und Physik 74 (2023).","apa":"Winkler, M. (2023). Global generalized solvability in a strongly degenerate taxis-type parabolic system modeling migration–consumption interaction. Zeitschrift Für Angewandte Mathematik Und Physik, 74(1), Article 32. https://doi.org/10.1007/s00033-022-01925-3","chicago":"Winkler, Michael. “Global Generalized Solvability in a Strongly Degenerate Taxis-Type Parabolic System Modeling Migration–Consumption Interaction.” Zeitschrift Für Angewandte Mathematik Und Physik 74, no. 1 (2023). https://doi.org/10.1007/s00033-022-01925-3.","mla":"Winkler, Michael. “Global Generalized Solvability in a Strongly Degenerate Taxis-Type Parabolic System Modeling Migration–Consumption Interaction.” Zeitschrift Für Angewandte Mathematik Und Physik, vol. 74, no. 1, 32, Springer Science and Business Media LLC, 2023, doi:10.1007/s00033-022-01925-3."},"publisher":"Springer Science and Business Media LLC","volume":74,"type":"journal_article","keyword":["Applied Mathematics","General Physics and Astronomy","General Mathematics"]}