Lower Bound of the First Eigenvalue for the Laplace Operator on Compact Riemannian Manifold
祁锋, 郭白妮
Lower Bound of the First Eigenvalue for the Laplace Operator on Compact Riemannian Manifold
Qi Feng, Guo Baini
数学季刊 . 1993, (2): 40 -49 .