skip to content

Wittum, Gabriel 1956-

Overview
Works: 74 works in 186 publications in 2 languages and 1,162 library holdings
Genres: Conference papers and proceedings 
Roles: Author, Editor, Contributor, Other
Classifications: QA377, 515.353
Publication Timeline
Key
Publications about Gabriel Wittum
Publications by Gabriel Wittum
Most widely held works by Gabriel Wittum
Numerical solution of elliptic differential equations by reduction to the interface by Boris N Khoromskij( Book )
8 editions published in 2004 in English and held by 162 libraries worldwide
This is the first book that deals systematically with the numerical solution of elliptic partial differential equations by their reduction to the interface via the Schur complement. Inheriting the beneficial features of finite element, boundary element and domain decomposition methods, our approach permits solving iteratively the Schur complement equation with linear-logarithmic cost in the number of the interface degrees of freedom. The book presents the detailed analysis of the efficient data-sparse approximation techniques to the nonlocal Poincaré-Steklov interface operators associated with the Laplace, biharmonic, Stokes and Lamé equations. Another attractive topic are the robust preconditioning methods for elliptic equations with highly jumping, anisotropic coefficients. A special feature of the book is a unified presentation of the traditional iterative substructuring and multilevel methods combined with modern matrix compression techniques applied to the Schur complement on the interface
Multigrid methods V : proceedings of the Fifth European Multigrid Conference, held in Stuttgart, Germany, October 1-4, 1996 by W Hackbusch( Book )
12 editions published in 1998 in English and held by 93 libraries worldwide
This volume contains a selection from the papers presented at the Fifth European Multigrid Conference, held in Stuttgart, October 1996. All contributions were carefully refereed. The conference was organized by the Institute for Computer Applications (ICA) of the University of Stuttgart, in cooperation with the GAMM Committee for Scientific Computing, SFB 359 and 404 and the reserach network WiR Ba-Wü. The list of topics contained lectures on Multigrid Methods: robustness, adaptivity, wavelets, parallelization, application in computational fluid dynamics, porous media flow, optimisation and computational mechanics. A considerable part of the talks focused on algebraic multigrid methods
Filternde Zerlegungen : schnelle Löser für grosse Gleichungssysteme by Gabriel Wittum( Book )
7 editions published between 1990 and 2014 in German and held by 73 libraries worldwide
Incomplete decomposition (ILU) : algorithms, theory, and applications : proceedings of the Eighth GAMM-Seminar, Kiel, January 24-26, 1992 by GAMM SEMINAR ON INCOMPLETE DECOMPOSITION( Book )
4 editions published between 1992 and 1993 in English and held by 52 libraries worldwide
Adaptive methods--algorithms, theory and applications : proceedings of the Ninth GAMM-Seminar, Kiel, January 22-24, 1993 by W Hackbusch( Book )
7 editions published between 1993 and 1994 in English and held by 48 libraries worldwide
The GAMM Committee for "Efficient Numerical Methods for Partial Differential Equations" organizes workshops on subjects concerning the algorithmical treat ment of partial differential equations. The topics are discretization methods like the finite element and finite volume method for various types of applications in structural and fluid mechanics. Particular attention is devoted to advanced solu tion techniques. th The series of such workshops was continued in 1993, January 22-24, with the 9 Kiel-Seminar on the special topic "Adaptive Methods Algorithms, Theory and Applications" at the Christian-Albrechts-University of Kiel. The seminar was attended by 76 scientists from 7 countries and 23 lectures were given. The list of topics contained general lectures on adaptivity, special discretization schemes, error estimators, space-time adaptivity, adaptive solvers, multi-grid me thods, wavelets, and parallelization. Special thanks are due to Michael Heisig, who carefully compiled the contribu tions to this volume. November 1993 Wolfgang Hackbusch Gabriel Wittum v Contents Page A. AUGE, G. LUBE, D. WEISS: Galerkin/Least-Squares-FEM and Ani- tropic Mesh Refinement. 1 P. BASTIAN, G. WmUM : Adaptive Multigrid Methods: The UG Concept. 17 R. BEINERT, D. KRONER: Finite Volume Methods with Local Mesh Alignment in 2-D. 38 T. BONK: A New Algorithm for Multi-Dimensional Adaptive Nume- cal Quadrature. 54 F. A. BORNEMANN: Adaptive Solution of One-Dimensional Scalar Conservation Laws with Convex Flux. 69 J. CANU, H. RITZDORF : Adaptive, Block-Structured Multigrid on Local Memory Machines. 84 S. DAHLKE, A. KUNaTH: Biorthogonal Wavelets and Multigrid. 99 B. ERDMANN, R. H. W. HOPPE, R
Fast solvers for flow problems : proceedings of the Tenth GAMM-Seminar, Kiel, January 14-16, 1994 by GAMM Seminar( Book )
5 editions published in 1995 in English and held by 43 libraries worldwide
Numerical treatment of multi-scale problems : proceedings of the 13th GAMM-Seminar, Kiel, January 24-26, 1997 by GAMM-Seminar( Book )
3 editions published in 1999 in English and held by 40 libraries worldwide
Numerische Algorithmen auf Transputer-Systemen by Georg Bader( Book )
3 editions published in 1993 in German and held by 38 libraries worldwide
Distributive Iterationen für indefinite Systeme als Glätter in Mehrgitterverfahren am Beispiel der Stokes- und Navier-Stokes-Gleichungen mit Schwerpunkt auf unvollständigen Zerlegungen by Gabriel Wittum( Book )
10 editions published between 1986 and 1988 in German and Undetermined and held by 37 libraries worldwide
Numerical treatment of coupled systems : proceedings of the Eleventh GAMM-Seminar Kiel, January 20-22, 1995 by W Hackbusch( Book )
5 editions published between 1995 and 1996 in English and held by 36 libraries worldwide
The GAMM Committee for "Efficient Numerical Methods for Partial Differential Equations" organizes seminars and workshops on subjects concerning the algorithmic treatment of partial differential equations. The topics are discretisation methods like the finite element and the boundary element method for various type of applications in structural and fluid mechanics. Particular attention is devoted to the advanced solution methods. The series of such seminars was continued in 1995, January 20-22, with the 11th Kiel-Seminar on the special topic Numerical Treatment of Coupled Systems at the Christian-Albrechts-University of Kiel. The seminar was attended by 100 scientist from 9 countries. 23 lectures were given, including two survey lectures. Different kinds of couplings are considered in this volume. The coupling of different components may occur in the physical model. On the other hand, a coupling of subsystems can be generated by the numerical solution technique. General examples of the latter kind are the domain decomposition (see p. 128) or subspace decomposition (p. 117). The local defect correction method couples different discretizations of the same problem in order to improve the results, although the basic linear system to be solved remains unchanged (p. 47). In general, the aim of the numerical coupling is to make use of (efficient) subsystem solvers (p. 1). The combination of different discretization techniques is mentioned on page 59
Boundary elements : implementation and analysis of advanced algorithms : proceedings of the Twelfth GAMM-Seminar, Kiel, January 19-21, 1996 by W Hackbusch( Book )
6 editions published in 1996 in English and German and held by 33 libraries worldwide
The GAMM Committee for "Efficient Numerical Methods for Partial Differential Equations" organizes seminars and workshops on subjects concerning the algorithmic treatment of partial differential equations. The topics are discretisation methods like the finite element and the boundary element method for various type of applications in struc tural and fluid mechanics. Particular attention is devoted to advanced solution method". The latest seminar in this series was the 12th Kiel-Seminar which took place on January 19-21, 1996 at Christian-Albrechts-University of Kiel and focussed on the topic Boundary Elements: Implementation and Analysis of Advanced Algorithms. The seminar was attended by 65 scientists from 10 countries. 23 lectures were given, including two survey lectures. In the last years, a remarkable progress in the numerical treatment of boundary de ment methods (BEM) has been obtained in Germany. This is, in particular, a res~I1t of a Schwerpunktverfahren supported by the DFG. Many aspects of the BEM are not ouly analysed but also implemented. Therefore, these proceedings present a number of papers on implementational aspects besides the analysis of advanced techniques
Rekonstruktion von Oberflächenmorphologien und Merkmalskeletten aus dreidimensionalen Daten unter Verwendung hochparalleler Rechnerarchitekturen by Daniel Jungblut( file )
1 edition published in 2013 in German and held by 15 libraries worldwide
Parallel solution methods for differential equations by Georg Bader( Book )
2 editions published in 1992 in English and held by 7 libraries worldwide
Numerische Verfahren zur Parameterschätzung bei Pasten und zur Formoptimierung : Schlussbericht ( Computer File )
2 editions published between 2001 and 2002 in English and held by 7 libraries worldwide
Neue mathematische Verfahren in Industrie und Dienstleistung : Abschlußbericht 2003 ; Laufzeit: 1.1.2001 bis 31.12.2003 ( Computer File )
1 edition published in 2004 in German and held by 6 libraries worldwide
 
moreShow More Titles
fewerShow Fewer Titles
Alternative Names
Wittum, Gabriel
Languages
English (56)
German (27)
Covers
Close Window

Please sign in to WorldCat 

Don't have an account? You can easily create a free account.