Abstract
The present paper is concerned with optimization problems in which the data are differentiate functions having a locally Lipschitzian gradient mapping (C1.1-functions). We give second-order sufficient conditions for a stationary solution to be isolated or to be a strict local minimizer. It is shown that the results and ideas known for the case of twice differentiate data can be extended in a natural way. Applications to the analysis of semi-infinite programs, of iterated minimization procedures and of the stability of C1,1-programs are sketched.

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