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math.CA2025
Recent results on matrix weighted norm inequalities
David Cruz-Uribe
In this paper we give an overview of recent work on matrix weights, with particular emphasis on convex body sparse domination for singular integrals, Rubio de Francia extrapolation…
math.CA2025
Off-diagonal matrix extrapolation for Muckenhoupt bases
David Cruz-Uribe, Fatih Şirin
In this paper we extend the theory of Rubio de Francia extrapolation for matrix weights, recently introduced by Bownik and the first author, to off-diagonal extrapolation. We also…
math.CA2024
Two-weight norm inequalities for parabolic fractional maximal functions
David Cruz-Uribe, Kim Myyryläinen
We prove two-weight norm inequalities for parabolic fractional maximal functions using parabolic Muckenhoupt weights. In particular, we prove a two-weight, weak-type estimate and F…