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- 1.0474267 - ÚI 2018 RIV GB eng J - Journal Article
Scott, J. - Tůma, Miroslav
Improving the Stability and Robustness of Incomplete Symmetric Indefinite Factorization Preconditioners.
Numerical Linear Algebra with Applications. Roč. 24, č. 5 (2017), č. článku e2099. ISSN 1070-5325. E-ISSN 1099-1506
Grant - others:GA ČR(CZ) GC17-04150J; GA ČR(CZ) GC17-04150J; EPSRC(GB) EP/I013067/1
Institutional support: RVO:67985807
Keywords : incomplete factorizations * indefinite symmetric systems * iterative solvers * pivoting * preconditioning * sparse linear systems * sparse matrices
OECD category: Applied mathematics
Impact factor: 1.281, year: 2017
Permanent Link: http://hdl.handle.net/11104/0271387File Download Size Commentary Version Access a0474267.pdf 6 616.9 KB Publisher’s postprint require - 2.0405535 - UIVT-O 330913 SIGLE CZ eng V - Research Report
Duintjer Tebbens, Jurjen - Tůma, Miroslav
Preconditioner Updates for Solving Sequences of Large and Sparse Nonsymmetric Linear Systems.
Prague: ICS AS CR, 2005. 19 s. Technical Report, V-940.
R&D Projects: GA AV ČR 1ET400300415
Institutional research plan: CEZ:AV0Z10300504
Keywords : preconditioned iterative methods * sparse matrices * sequences of linear algebraic systems * incomplete factorizations * factorization updates * Gauss-Jordan transformations * minimum spanning tree
Subject RIV: BA - General Mathematics
Permanent Link: http://hdl.handle.net/11104/0125693File Download Size Commentary Version Access v940-05.pdf 15 289.1 KB Other open-access - 3.0402637 - UIVT-O 950245 CZ eng V - Research Report
Benzi, M. - Tůma, Miroslav
A Sparse Approximate Inverse Preconditioner for Nonsymmetric Linear Systems.
Prague: ICS AS CR, 1995. 36 s. Technical Report, V-653.
R&D Projects: GA ČR GA201/93/0067; GA AV ČR IAA230401
Keywords : large sparse systems * interative methods * preconditioning * approximate inverse * sparse linear systems * sparse matrices * incomplete factorizations * conjugate gradient-type methods
Permanent Link: http://hdl.handle.net/11104/0123023File Download Size Commentary Version Access v653-95.pdf 12 304.7 KB Other open-access - 4.0402636 - UIVT-O 980001 RIV US eng J - Journal Article
Benzi, M. - Tůma, Miroslav
A Sparse Approximate Inverse Preconditioner for Nonsymmetric Linear Systems.
SIAM Journal on Scientific Computing. Roč. 19, č. 3 (1998), s. 968-994. ISSN 1064-8275. E-ISSN 1095-7197
R&D Projects: GA ČR GA201/93/0067; GA AV ČR IAA230401
Keywords : large sparse systems * interative methods * preconditioning * approximate inverse * sparse linear systems * sparse matrices * incomplete factorizations * conjugate gradient-type methods
Subject RIV: BA - General Mathematics
Impact factor: 1.378, year: 1998
Permanent Link: http://hdl.handle.net/11104/0123022 - 5.0402484 - UIVT-O 950071 CZ eng V - Research Report
Benzi, M. - Meyer, C. D. - Tůma, Miroslav
A Sparse Approximate Inverse Preconditioner For The Conjugate Gradient Method.
Prague: ICS AS CR, 1995. 14 s. Technical Report, V-613.
R&D Projects: GA ČR GA201/93/0067
Keywords : sparse approximate inverses * preconditioned conjugate gradient method * H-matrices * incomplete factorizations
Permanent Link: http://hdl.handle.net/11104/0122891File Download Size Commentary Version Access v613-95.pdf 12 232.1 KB Other open-access - 6.0402240 - UIVT-O 960120 RIV US eng J - Journal Article
Benzi, M. - Meyer, C. D. - Tůma, Miroslav
A Sparse Approximate Inverse Preconditioner for the Conjugate Gradient Method.
SIAM Journal on Scientific Computing. Roč. 17, č. 5 (1996), s. 1135-1149. ISSN 1064-8275. E-ISSN 1095-7197
R&D Projects: GA ČR GA201/93/0067; GA AV ČR IAA230401
Keywords : large sparse systems * interative methods * sparse approximate inverses * preconditioned conjuge gradient method * H-matrices * incomplete factorizations
Impact factor: 1.023, year: 1996
Permanent Link: http://hdl.handle.net/11104/0122649 - 7.0399805 - ÚI 2014 RIV CZ eng L4 - Software
Tůma, Miroslav - Scott, J.
HSL_MI28 Symmetric system: incomplete Cholesky factorization.
Internal code: HSL_MI28 ; 2013
Technical parameters: Nový program využívá dodatečné paměti pro uložení rozkladu matice, která se použije pouze v průběhu rozkladu. Při použití takto získaných faktorů matice je tato paměť uvolněna a tím se umožní řešení rozsáhlejších úloh.
Economic parameters: rychlejší a robustnější výpočet vědecko-technických úloh založených na diskretizaci spojité formulace
R&D Projects: GA ČR GA13-06684S
Institutional support: RVO:67985807
Keywords : preconditioning * large sparse linear systems * iterative methods * incomplete factorizations
Subject RIV: IN - Informatics, Computer Science
http://www.hsl.rl.ac.uk/catalogue/hsl_mi28.xml
Permanent Link: http://hdl.handle.net/11104/0227031 - 8.0351679 - ÚI 2012 RIV SE eng J - Journal Article
Scott, J. - Tůma, Miroslav
The Importance of Structure in Incomplete Factorization Preconditioners.
Bit. Roč. 51, č. 2 (2011), s. 385-404. ISSN 0006-3835. E-ISSN 1572-9125
Grant - others:GA AV ČR(CZ) M100300902
Institutional research plan: CEZ:AV0Z10300504
Keywords : sparse symmetric linear systems * incomplete factorizations * preconditioners * level-based approach
Subject RIV: BA - General Mathematics
Impact factor: 0.724, year: 2011
Permanent Link: http://hdl.handle.net/11104/0191383File Download Size Commentary Version Access 0351679.pdf 0 642.5 KB Author´s preprint open-access - 9.0338823 - ÚI 2011 RIV GB eng J - Journal Article
Duintjer Tebbens, Jurjen - Tůma, Miroslav
Preconditioner Updates for Solving Sequences of Linear Systems in Matrix-Free Environment.
Numerical Linear Algebra with Applications. Roč. 17, č. 6 (2010), s. 997-1019. ISSN 1070-5325. E-ISSN 1099-1506
R&D Projects: GA AV ČR IAA100300802; GA AV ČR KJB100300703
Grant - others:GA AV ČR(CZ) M100300902
Institutional research plan: CEZ:AV0Z10300504
Source of funding: I
Keywords : preconditioned iterative methods * matrix-free environment * factorization updates * inexact Newton-Krylov methods * incomplete factorizations
Subject RIV: BA - General Mathematics
Impact factor: 1.163, year: 2010
Permanent Link: http://hdl.handle.net/11104/0182494File Download Size Commentary Version Access 0338823.pdf 1 794.5 KB Author´s preprint open-access - 10.0313310 - ÚI 2009 RIV DE eng J - Journal Article
Birken, P. - Duintjer Tebbens, Jurjen - Meister, A. - Tůma, Miroslav
Updating Preconditioners for Permuted Non-Symmetric Linear Systems.
[Aktualizace předpodmínění pro permutované nesymetrické systémy lineárních rovnic.]
Proceedings in Applied Mathematics and Mechanics. Roč. 7, č. 1 (2007), s. 1022101-1022102. ISSN 1617-7061
R&D Projects: GA AV ČR KJB100300703
Institutional research plan: CEZ:AV0Z10300504
Keywords : preconditioner updates * sequences of linear systems * nonsymmetric incomplete factorizations * physics-based permutation of linear systems
Subject RIV: BA - General Mathematics
Permanent Link: http://hdl.handle.net/11104/0164171