Self-improving properties of inequalities of Poincaré type on measure spaces and applications |
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Authors: | Seng-Kee Chua Richard L Wheeden |
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Institution: | a Department of Mathematics, National University of Singapore, 10, Kent Ridge Crescent, Singapore 119260, Singapore b Department of Mathematics, Rutgers University, New Brunswick, NJ 08903, USA |
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Abstract: | We show that the self-improving nature of Poincaré estimates persists for domains in rather general measure spaces. We consider both weak type and strong type inequalities, extending techniques of B. Franchi, C. Pérez and R. Wheeden. As an application in spaces of homogeneous type, we derive global Poincaré estimates for a class of domains with rough boundaries that we call ?-John domains, and we show that such domains have the requisite properties. This class includes John (or Boman) domains as well as s-John domains. Further applications appear in a companion paper. |
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Keywords: | Global Poincaré estimates Power type weights Quasimetric spaces s-John domains |
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