Mathematics – Classical Analysis and ODEs
Scientific paper
2010-01-26
Mathematics
Classical Analysis and ODEs
To appear in the Electronic Research Announcements in Mathematical Sciences
Scientific paper
We give a new proof of the sharp weighted $L^2$ inequality ||T||_{L^2(w)} \leq c [w]_{A_2} where $T$ is the Hilbert transform, a Riesz transform, the Beurling-Ahlfors operator or any operator that can be approximated by Haar shift operators. Our proof avoids the Bellman function technique and two weight norm inequalities. We use instead a recent result due to A. Lerner to estimate the oscillation of dyadic operators.
Cruz-Uribe David
Martell José María
Pérez Carlos
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