THE SHARP SQUARE FUNCTION ESTIMATE WITH MATRIX WEIGHT
Résumé
We prove the matrix A 2 conjecture for the dyadic square function, that is, an estimate of the form S W L 2 C d (W)→L 2 R [W ] A 2 , where the focus is on the sharp linear dependence on the matrix A 2 constant. Moreover, we give a mixed estimate in terms of A 2 and A∞ constants. Key is a sparse domination of a process inspired by the integrated form of the matrix-weighted square function.
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