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- W2110482227 abstract "Let M be an n-dimensional compact Riemannian manifold with boundary .part.M. We consider the Neumann eigenvalue problem on M of the equation (Fig.) where .upsilon. is the unit outward normal vector to the boundary .part.M. due to the importance of Poincare inequality for analysis on manifolds, one wishes to obtain the lower bound of the first non-zero eigenvalue .eta. of (1.1). For the purpose of applications, it is important to relax the dependency of the lower bound on the geometric quantities. For general compact manifolds with convex boundary, Li-Yau [3] obtained the lower bound of .eta.. Recently, Roger Chen [1] investigated the lower bound of the first Neumann eigenvalue .eta. on compact manifold M with nonconvex boundary. We investigate the lower bound .eta. with the same conditions as those of Roger chen. But, using the different auxiliary function, we have the following theorem." @default.
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- W2110482227 date "1993-01-01" @default.
- W2110482227 modified "2023-09-24" @default.
- W2110482227 title "THE FIRST EIGENVALUE ESTIMATE ON A COMPACT RIEMANNIAN MANIFOLD" @default.
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