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arXiv · 1801.06978

A maximal function approach to two-measure Poincar\'e inequalities

Juha Kinnunen·Riikka Korte·Juha Lehrbäck·Antti V. Vähäkangas
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Abstract

This paper extends the self-improvement result of Keith and Zhong in [16] to the two-measure case. Our main result shows that a two-measure $(p,p)$-Poincar\'e inequality for $1 0$ under a balance condition on the measures. The corresponding result for a maximal Poincar\'e inequality is also considered. In this case the left-hand side in the Poincar\'e inequality is replaced with an integral of a sharp maximal function and the results hold without a balance condition. Moreover, validity of maximal Poincar\'e inequalities is used to characterize the self-improvement of two-measure Poincar\'e inequalities. Examples are constructed to illustrate the role of the assumptions. Harmonic analysis and PDE techniques are used extensively in the arguments.

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Juha Kinnunen, Riikka Korte, Juha Lehrbäck, Antti V. Vähäkangas. 2018-01-22. A maximal function approach to two-measure Poincar\'e inequalities. https://arxiv.org/abs/1801.06978

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