Variational Methods for Eigenvalue Problems: An Introduction to the Weinstein Method of Intermediate Problems
Sydney H. Gould · CERN Document Server (European Organization for Nuclear Research) · 1966
The first edition of this book gave a systematic exposition of the Weinstein method of calculating lower bounds of eigenvalues by means of intermediate problems. This second edition presents new developments in the framework of the material contained in the first edition, which is retained in somewhat modified form.