Diastolic and isoperimetric inequalities on surfaces

Diastolic and isoperimetric inequalities on surfaces

We prove a universal inequality between the diastole, defined using a minimax process on the one-cycle space, and the area of closed Riemannian surfaces. Roughly speaking, we show that any closed Riemannian surface can be swept out by a family of multi-loops whose lengths are bounded in terms of the...

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Veröffentlicht in:arXiv.org 2024-02
Hauptverfasser: Balacheff, Florent, Sabourau, Stéphane
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Sprache:eng
Schlagworte:
Diastole
Geodesy
Mathematics - Differential Geometry
Mathematics - Geometric Topology
Minimax technique
Riemann surfaces
Upper bounds
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description We prove a universal inequality between the diastole, defined using a minimax process on the one-cycle space, and the area of closed Riemannian surfaces. Roughly speaking, we show that any closed Riemannian surface can be swept out by a family of multi-loops whose lengths are bounded in terms of the area of the surface. This diastolic inequality, which relies on an upper bound on Cheeger's constant, yields an effective process to find short closed geodesics on the two-sphere, for instance. We deduce that every Riemannian surface can be decomposed into two domains with the same area such that the length of their boundary is bounded from above in terms of the area of the surface. We also compare various Riemannian invariants on the two-sphere to underline the special role played by the diastole.
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subjects Diastole
Geodesy
Mathematics - Differential Geometry
Mathematics - Geometric Topology
Minimax technique
Riemann surfaces
Upper bounds
title Diastolic and isoperimetric inequalities on surfaces
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