Accession Number : ADA114538

Title :   Local Duality of Nonlinear Programs.

Descriptive Note : Technical summary rept.,

Corporate Author : WISCONSIN UNIV-MADISON MATHEMATICS RESEARCH CENTER

Personal Author(s) : Fujiwara,O ; Han,S -P ; Mangasarian,O L

PDF Url : ADA114538

Report Date : Feb 1982

Pagination or Media Count : 23

Abstract : It is shown that the second order sufficient (necessary) optimality condition for the dual of a nonlinear program is equivalent to the inverse of the Hessian of the Lagrangian being positive definite (semidefinite) on the normal cone to the local primal constraint surface. This compares with the Hessian itself being positive definite (semidefinite) on the tangent cone on the local primal constraint surface for the corresponding second order condition for the primal problem. We also show that primal second order sufficiency (necessity) and dual second order necessity (sufficiency) is essentially equivalent to the Hessian of the Lagrangian being positive definite. This follows from the following interesting linear algebra result: a necessary and sufficient condition for a nonsingular nxn matrix to be positive definite is that for each or some subspace of r(n), the matrix must be positive definite on the subspace and its inverse be positive semidefinite on the orthogonal complement of the subspace. (Author)

Descriptors :   *Nonlinear algebraic equations, *Nonlinear programming, *Inversion, Conical bodies, Tangents, Optimization, Quality, Orthogonality

Subject Categories : Theoretical Mathematics

Distribution Statement : APPROVED FOR PUBLIC RELEASE