Accession Number : AD0468167

Title :   A DIGITAL PROCEDURE FOR USE OF THE METHOD OF EXTENSIONS AND RESTRICTIONS OF QUADRATIC FORMS.

Descriptive Note : Technical memo.,

Corporate Author : JOHNS HOPKINS UNIV LAUREL MD APPLIED PHYSICS LAB

Personal Author(s) : Rubinstein, Nathan

Report Date : JUN 1965

Pagination or Media Count : 8

Abstract : This report describes the FORTRAN subroutine EROP that implements the method of Extensions and Restrictions of Operators for calculation of rigorous lower bounds to eigenvalues of selfadjoint operators in separable Hilbert space, in particular, for lower bounds to frequencies of continuous linear elastic systems in free vibration. The method uses eigenvalues and eigenvectors of base problems to construct a matrix of which the eigenvalues are lower bounds to those of the self-adjoint operator. (Author)

Descriptors :   (*COMPUTER PROGRAMMING, OPERATORS(MATHEMATICS)), (*POLYNOMIALS, COMPUTER PROGRAMMING), QUADRATIC PROGRAMMING.

Distribution Statement : APPROVED FOR PUBLIC RELEASE