Sylvestre Gallot

Sylvestre F. L. Gallot (born January 29, 1948, in Bazoches-lès-Bray)[1][2] is a French mathematician, specializing in differential geometry.

He is an emeritus professor at the Institut Fourier of the Université Grenoble Alpes, in the Geometry and Topology section.

His research deals with isoperimetric inequalities in Riemann geometry, rigidity issues, and the Laplace operator spectrum on Riemannian manifolds.

With Gérard Besson and Pierre Bérard, he discovered, in 1985, a form of isoperimetric inequality in Riemannian manifolds with a lower bound involving the diameter and Ricci curvature.

[5] In 1995, he discovered with Gérard Besson and Gilles Courtois, a Chebyshev inequality for the minimal entropy of locally symmetrical spaces of negative curvature; the inequality gives a new and simpler proof of the Mostow rigidity theorem.