Rademacher type and Enflo type coincide
Functional Analysis
2023-09-18 v2 Metric Geometry
Abstract
A nonlinear analogue of the Rademacher type of a Banach space was introduced in classical work of Enflo. The key feature of Enflo type is that its definition uses only the metric structure of the Banach space, while the definition of Rademacher type relies on its linear structure. We prove that Rademacher type and Enflo type coincide, settling a long-standing open problem in Banach space theory. The proof is based on a novel dimension-free analogue of Pisier's inequality on the discrete cube.
Keywords
Cite
@article{arxiv.2003.06345,
title = {Rademacher type and Enflo type coincide},
author = {Paata Ivanisvili and Ramon van Handel and Alexander Volberg},
journal= {arXiv preprint arXiv:2003.06345},
year = {2023}
}
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11 pages