Mathematical Inequalities & Applications · Volume 1, Issue 4 Inequalities for the minimal eigenvalue of the laplacian in an annulus 01-54 Pages 559-563 DOI 10.7153/mia-01-54 Downloads Short PDF Full PDF PNG Authors Alexander G. Ramm P. N. Shivakumar Keywords inequalities estimation of eigenvalues perturbation theory Subject classes 35J05 35P15