| Literature DB >> 16592231 |
Abstract
In this paper a variational formula is obtained for the principal eigenvalue for operators with maximum principle. This variational formula does not require the operators to be self-adjoint. But if they are self-adjoint this formula reduces to the classical Rayleigh-Ritz formula.Year: 1975 PMID: 16592231 PMCID: PMC432403 DOI: 10.1073/pnas.72.3.780
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN: 0027-8424 Impact factor: 11.205