Mathematics – Classical Analysis and ODEs
Scientific paper
2010-11-26
Mathematics
Classical Analysis and ODEs
19 pages. Submitted to the proceedings of the Jozef Marcinkiewicz Centenary Conference
Scientific paper
For an L ^2-bounded Calderon-Zygmund Operator T, and a weight w \in A_2, the norm of T on L ^2 (w) is dominated by A_2 characteristic of the weight. The recent theorem completes a line of investigation initiated by Hunt-Muckenhoupt-Wheeden in 1973, has been established in different levels of generality by a number of authors over the last few years. It has a subtle proof, whose full implications will unfold over the next few years. This sharp estimate requires that the A_2 character of the weight can be exactly once in the proof. Accordingly, a large part of the proof uses two-weight techniques, is based on novel decomposition methods for operators and weights, and yields new insights into the Calder\'on-Zygmund theory. We survey the proof of this Theorem in this paper.
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