3 papers
math.FA2023
Endpoint theory for the compactness of commutators
Dinghuai Wang, Xi Hu, Shuai Qi
In this paper, we establish a Minkowski-type inequality for weak Lebesgue space, which allows us to obtain a characterization of relative compactness in these spaces. Furthermore,…
math.AP2023
Wiener's criterion for degenerate parabolic equations
Xi Hu, Lin Tang
In this paper, we prove Wiener's criterion for parabolic equations with singular and degenerate coefficients. To be precise, we study the problem of the regularity of boundary poin…
math.AP2022
Critical Fujita exponent for a semilinear heat equation with degenerate coefficients
Xi Hu, Lin Tang
We prove the existence of a critical Fujita exponent for a non-homogeneous semilinear heat equation which involves degenerate coefficients. More precisely, in order to give a rathe…