Lower bounds to eigenvalues of the Schrodinger equation by solution of a 90-y challenge [Chemistry]

The Ritz upper bound to eigenvalues of Hermitian operators is essential for many applications in science. It is a staple of quantum chemistry and physics computations. The lower bound devised by Temple in 1928 [G. Temple, Proc. R. Soc. A Math. Phys. Eng. Sci. 119, 276–293 (1928)] is not, since...
Source: Proceedings of the National Academy of Sciences - Category: Science Authors: Tags: Physical Sciences Source Type: research