## S. Nardulli - L. E. Osorio Acevedo

# Sharp isoperimetric inequalities for small volumes in complete noncompact Riemannian manifolds of bounded geometry involving the scalar curvature

created by nardulli on 05 Nov 2016

modified on 31 Jul 2019

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BibTeX]

*Published Paper*

**Inserted:** 5 nov 2016

**Last Updated:** 31 jul 2019

**Journal:** International Mathematics Research Notices

**Pages:** 72

**Year:** 2016

**Doi:** 10.1093/imrn/rny131

**Abstract:**

We provide an isoperimetric comparison theorem for small volumes in an n-dimensional Riemannian manifold (Mn,g) with strong bounded geometry, as in Definition 2.3, involving the scalar curvature function. Namely in strong bounded geometry, if the supremum of scalar curvature function Sg < n(n − 1)k0 for some k0 ∈ R, then for small volumes the isoperimetric profile of (Mn,g) is less then or equal to the isoperimetric profile of Mnk0 the complete simply connected space form of constant sectional curvature k0. This work generalizes Theorem 2 of Dru02b in which the same result was proved in the case where (M,g) is assumed to be just compact. As a consequence of our result we give an asymptotic expansion in Puiseux’s series up to the second nontrivial term of the isoperimetric profile function for small volumes. Finally, as a corollary of our isoperimetric comparison result, it is shown, in the special case of manifolds with strong bounded geometry, and Sg < n(n − 1)k0 that for small volumes the
Aubin-Cartan-Hadamard’s Conjecture in any dimension n is true.

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