On metric formulations of Kwapień's theorem

Speaker(s)

Alexandros Eskenazis

Affiliation

Sorbonne Université

Language of the talk

English

Date

Oct. 30, 2025, 12:15 p.m.

Room

room 3160

Title in Polish

On metric formulations of Kwapień's theorem

Seminar

Seminar of Probability Group

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We will construct counterexamples to previously conjectured metric formulations of Kwapień's theorem from Banach space theory. The key new ingredient in our construction is a novel rigidity theorem for metric transforms of nonpositively curved Alexandrov spaces. Time permitting, further geometric and algorithmic applications of this rigidity will also be discussed. The talk is based on joint work with M. Mendel (Open University of Israel) and A. Naor (Princeton).

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