Národní úložiště šedé literatury Nalezeno 29 záznamů.  začátekpředchozí20 - 29  přejít na záznam: Hledání trvalo 0.00 vteřin. 
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.
Simple Scaling for Variable Metric Updates
Lukšan, Ladislav ; Vlček, Jan
Plný tet: v611-95 - Stáhnout plný textPDF
Plný text: content.csg - Stáhnout plný textPDF
Shifted Variable Metric Methods for Unconstrained Optimization
Lukšan, Ladislav ; Vlček, Jan
A family of shifted variable metric methods for unconstrained optimization is investigated. These methods form a basis for shifted limited-memory variable metric methods introduced in second contribution in proceedings of SANM 2003. We describe basic properties of these methods, establish their global convergence and give conditions for the superlinear rate of convergence. Their efficiency is demonstrated by using extensive numerical experiments.
New Limited-Memory Variable Metric Methods for Unconstrained Optimization
Vlček, Jan ; Lukšan, Ladislav
A new family of numerically efficient variable metric or quasi-Newton methods for unconstrained optimizaion is adapted for large-scale optimization. Global convergence of the method can be established for convex sufficiently smooth functions. Some encouraging numerical experience is reported. We refer to our report V-876 for proof and details.

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