Bulletin of the London Mathematical Society Advance Access published online on September 23, 2009
Bulletin of the London Mathematical Society, doi:10.1112/blms/bdp077
© 2009 London Mathematical Society
Algebras of differentiable functions on Riemannian manifolds
Departamento de Geometría y Topología
Universidad Complutense de Madrid
28040 Madrid
Spain
Departamento de Análisis Matemático
Universidad Complutense de Madrid
28040 Madrid
Spain
jaramil@mat.ucm.es
yenny.rangel@mat.ucm.es
Received 5 August 2008. Revision received 27 May 2009.
For an infinite-dimensional Riemannian manifold M we denote by C
(M) the space of all real bounded functions of class C1 on M with bounded derivative. In this paper we shall see how the natural structure of normed algebra on C
(M) characterizes the Riemannian structure of M, for the special case of the so-called uniformly bumpable manifolds. For that we need, among other things, to extend the classical Myers–Steenrod theorem on the equivalence between metric and Riemannian isometries, to the setting of infinite-dimensional Riemannian manifolds.
2000 Mathematics Subject Classification 58B20, 46E25, 54C35.
Research supported in part by D.G.I. (Spain) Grant MTM2006-03531.