Non-homogeneous Tb Theorem and Random Dyadic Cubes on Metric Measure Spaces

Tuomas Hytönen1, Henri Martikainen1
1Department of Mathematics and Statistics, University of Helsinki, Helsinki, Finland

Tóm tắt

We prove a Tb theorem on quasimetric spaces equipped with what we call an upper doubling measure. This is a property that encompasses both the doubling measures and those satisfying the upper power bound μ(B(x,r))≤Cr d . Our spaces are only assumed to satisfy the geometric doubling property: every ball of radius r can be covered by at most N balls of radius r/2. A key ingredient is the construction of random systems of dyadic cubes in such spaces.

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