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On the existence of maximizers for functionals with critical exponential growth in R2

Cristina Tarsi

math.AParXiv:math/0609791

Abstract

In this paper we establish the existence of extremal functions for weighted functionals with critical exponential growth in R2, which arise from Henon-type equations. The proof is based on the notion of spherical symmetrization with respect to a measure, which allows us to reduce the problem to a one dimensional functional as in the proof due to Carleson and Chang for the unweighted case.

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