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math.AP2022
Regularity theory of quasilinear elliptic and parabolic equations in the Heisenberg group
Luca Capogna, Giovanna Citti, Xiao Zhong
This note provides a succinct survey of the existing literature concerning the Hölder regularity for the gradient of weak solutions of PDEs of the form $$\sum_{i=1}^{2n} X_i A_i(\n…
math.AP2022
Green function in metric measure spaces
Mario Bonk, Luca Capogna, Xiaodan Zhou
We study existence and uniqueness of Green functions for the Cheeger -Laplacian in metric measure spaces that are Ahlfors -regular and support a -Poincaré inequality with…
math.AP2022★ 7 cited
Neumann problems for -harmonic functions, and induced nonlocal operators in metric measure spaces
Luca Capogna, Josh Kline, Riikka Korte +2
Following ideas of Caffarelli and Silvestre in~\cite{CS}, and using recent progress in hyperbolic fillings, we define fractional -Laplacians with on any compa…