preprint Fabian Gundlach author 100450 Beranger Fabrice Seguin author 102487 We study the asymptotic distribution of wildly ramified extensions of function fields in characteristic $p > 2$, focusing on (certain) $p$-groups of nilpotency class at most $2$. Rather than the discriminant, we count extensions according to an invariant describing the last jump in the ramification filtration at each place. We prove a local-global principle relating the distribution of extensions over global function fields to their distribution over local fields, leading to an asymptotic formula for the number of extensions with a given global last-jump invariant. A key ingredient is Abrashkin's nilpotent Artin-Schreier theory, which lets us parametrize extensions and obtain bounds on the ramification of local extensions by estimating the number of solutions to certain polynomial equations over finite fields. 2025 eng 2502.18207 Gundlach, Fabian, and Beranger Fabrice Seguin. “Counting Two-Step Nilpotent Wildly Ramified Extensions of Function  Fields.” <i>ArXiv:2502.18207</i>, 2025. @article{Gundlach_Seguin_2025, title={Counting two-step nilpotent wildly ramified extensions of function  fields}, journal={arXiv:2502.18207}, author={Gundlach, Fabian and Seguin, Beranger Fabrice}, year={2025} } F. Gundlach, B.F. Seguin, ArXiv:2502.18207 (2025). Gundlach, F., &#38; Seguin, B. F. (2025). Counting two-step nilpotent wildly ramified extensions of function  fields. In <i>arXiv:2502.18207</i>. Gundlach, Fabian, and Beranger Fabrice Seguin. “Counting Two-Step Nilpotent Wildly Ramified Extensions of Function  Fields.” <i>ArXiv:2502.18207</i>, 2025. F. Gundlach and B. F. Seguin, “Counting two-step nilpotent wildly ramified extensions of function  fields,” <i>arXiv:2502.18207</i>. 2025. Gundlach F, Seguin BF. Counting two-step nilpotent wildly ramified extensions of function  fields. <i>arXiv:250218207</i>. Published online 2025. 588522025-02-26T08:51:57Z2025-02-26T08:53:08Z