A maximal Function Approach to Two-Measure Poincaré Inequalities

Research output: Contribution to journalArticle


Research units

  • University of Jyväskylä


This paper extends the self-improvement result of Keith and Zhong in Keith and Zhong (Ann. Math. 167(2):575–599, 2008) to the two-measure case. Our main result shows that a two-measure (p, p)-Poincaré inequality for 1 < p< ∞ improves to a (p, p- ε) -Poincaré inequality for some ε> 0 under a balance condition on the measures. The corresponding result for a maximal Poincaré inequality is also considered. In this case the left-hand side in the Poincaré inequality is replaced with an integral of a sharp maximal function and the results hold without a balance condition. Moreover, validity of maximal Poincaré inequalities is used to characterize the self-improvement of two-measure Poincaré inequalities. Examples are constructed to illustrate the role of the assumptions. Harmonic analysis and PDE techniques are used extensively in the arguments.


Original languageEnglish
Pages (from-to)1763–1810
Issue number2
Early online date2018
Publication statusPublished - Apr 2019
MoE publication typeA1 Journal article-refereed

    Research areas

  • Geodesic two-measure space, Poincaré inequality, Self-improvement

ID: 31918033