A sharp estimate of weighted dyadic shifts of complexity 0 and 1
classification
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math.AP
keywords
dyadicsharpshiftstransformweightedweightsanalysisbellman
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A simple shortcut to proving sharp weighted estimates for the Martingale Transform and for the dyadic shift of order 1 (and so for the Hilbert transform) is presented. It is a unified proof for these both transforms. Key words: Calder\on--Zygmund operators, $A_2$ weights, $A_1$ weights, Carleson embedding theorem, Bellman function, dyadic shifts, nonhomogeneous Harmonic Analysis.
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