National Repository of Grey Literature 10 records found  Search took 0.01 seconds. 
Variable Metric Method for Nonconvex Nonsmooth Unconstrained Minimization
Vlček, Jan ; Lukšan, Ladislav
A special variable metric method is given for finding stationary points of locally Lipschitz continuous functions which are not necessarily convex or differentiable. Time consuming quadratic programming subproblems do not need to be solved. Some variable numerical experience is reported.
Conjugate Gradient Methods for Saddle Point Systems
Lukšan, Ladislav ; Vlček, Jan
Conjugate gradient methods have proved to be very efficient for solving saddle point systems, especially with indefinite preconditioning. These systems are idefinite and have a 2x2 block structure. We study various structured conjugate gradient methods and prove their theoretical properties.
Spectral Radius of Opertators on l
Pták, Vlastimil
Fulltext: content.csg - Download fulltextPDF
Plný tet: v747-98 - Download fulltextPDF

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