Spectral radius, index estimates for Schrodinger operators and geometric applications

Details Spectral radius, index estimates for Schrodinger operators and geometric applications Spectral radius, index estimates for Schrodinger operators and geometric applications

2010-03-30

arxiv.org/abs/1003.5798v1

J. Funct. Anal. 256 (2009), no. 6, 1769--1820

Mathematics

Differential Geometry

48 pages

Scientific paper

In this paper we study the existence of a first zero and the oscillatory behavior of solutions of the ordinary differential equation $(vz')'+Avz = 0$, where $A,v$ are functions arising from geometry. In particular, we introduce a new technique to estimate the distance between two consecutive zeros. These results are applied in the setting of complete Riemannian manifolds: in particular, we prove index bounds for certain Schr\"odinger operators, and an estimate of the growth of the spectral radius of the Laplacian outside compact sets when the volume growth is faster than exponential. Applications to the geometry of complete minimal hypersurfaces of Euclidean space, to minimal surfaces and to the Yamabe problem are discussed.

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