Mathematical Research Letters

Volume 28 (2021)

Number 4

Approximation rigidity and $h$-principle for Bing spines

Pages: 1107 – 1123

DOI: https://dx.doi.org/10.4310/MRL.2021.v28.n4.a6

Authors

Michael Freedman (Microsoft Research, Station Q; and Department of Mathematics, University of California, Santa Barbara, Calif., U.S.A.)

T. Tâm Nguễyn-Phan (Max Planck Institut für Mathematik, Bonn, Germany)

Abstract

We show that all $\mathsf{PL}$ manifolds of dimension $\geq 3$ have spines similar to Bing’s house with two rooms. Beyond this we explore approximation rigidity and an $h$-principle.

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Received 23 January 2020

Accepted 5 February 2021

Published 22 November 2021