National Repository of Grey Literature 138 records found  beginprevious91 - 100nextend  jump to record: Search took 0.00 seconds. 
Preconditioning of Saddle Point Systems
Lukšan, Ladislav ; Vlček, Jan
The solution of the original system, the use of the null space transformation and the use of the range space transformation are considered. Computational experiments are given. Generalization of saddle point systems is studied.
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.

National Repository of Grey Literature : 138 records found   beginprevious91 - 100nextend  jump to record:
See also: similar author names
11 VLČEK, Jakub
13 VLČEK, Jiří
11 Vlček, Jakub
13 Vlček, Jiří
13 Vlček, Josef
2 Vlček, Jozef
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