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Positive Curvature, Macroscopic Dimension, Spectral Gaps and Higher Signatures

Identifieur interne : 002B35 ( Istex/Corpus ); précédent : 002B34; suivant : 002B36

Positive Curvature, Macroscopic Dimension, Spectral Gaps and Higher Signatures

Auteurs : M. Gromov

Source :

RBID : ISTEX:D2681EB71F482A0EE9F8A12F1D8802C623FC24C6

Abstract

Abstract: Our journey starts with a macroscopic view of Riemannian manifolds with positive scalar curvature and terminates with a glimpse of the proof of the homotopy invariance of some Novikov higher signatures of non-simply connected manifolds. Our approach focuses on the spectra of geometric differential operators on compact and non-compact manifolds V where the link with the macroscopic geometry and topology is established with suitable index theorems for our operators twisted with almost flat bundles over V. Our perspective mainly comes from the asymptotic geometry of infinite groups and foliations.

Url:
DOI: 10.1007/978-1-4612-4098-3_1

Links to Exploration step

ISTEX:D2681EB71F482A0EE9F8A12F1D8802C623FC24C6

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