Daniel B. Szyld

Department of Mathematics
College of Science and Technology
Temple University
1805 N Broad Street
Philadelphia, PA 19122-6094, USA
Phone +1 215 204 7288
FAX +1 215 204 6433
szyld AT temple DOT edu

(About this photograph, and others)

My interest is Numerical Analysis and Scientific Computing in general, and Numerical and Applied Linear Algebra in particular.

I am a member of the Editorial Boards of:
The Electronic Journal of Linear Algebra (ELA),
the Electronic Transactions on Numerical Analysis (ETNA) ( European mirror site), (CALL FOR PAPERS FOR SPECIAL VOLUME DEDICATED TO OLOF WIDLUND),
Linear Algebra and its Applications,
Mathematics of Computation,
Numerical Linear Algebra with Applications,
Journal of Numerical Analysis and Approximation Theory (published by the Romanian Academy),
SeMA Journal: Boletín de la Sociedad Española de Matemática Aplicada,
and the SIAM Journal on Matrix Analysis and Applications (Editor-in-chief).

I am also a member of the Board of Advisors of Accelogic.

Seminars at Temple University.
Applied Mathematics and Scientific Computing at Temple University.
Mathematical Contest in Modeling for undergraduates at Temple.

Upcoming conferences and events of note:

17th GAMM Workshop Applied and Numerical Linear Algebra, 7-8 September 2017, Cologne, Germany.
International Conference on Matrix Analysis and its Applications (Math Triad 2017), 25-29 September 2017, Bedlewo, Poland.
Mid-Atlantic NA-Day, 3 November 2017, Philadelphia.
Copper Mountain Conference on Iterative Methods, 25-30 March 2018, Copper Mountain, Colorado.
SIAM Conference on Applied Linear Algebra, 4-8 May 2018, Hong Kong.
Third conference on Numerical Analysis and Scientific Computation with Applications (NASCA '18), 2-6 July 2018. Kalamata, Greece.
25th International Domain Decomposition Conference (DD XXV), 23-27 July 2018, St. John's, Newfoundland, Canada.
22nd Conference of the International Linear Algebra Society (ILAS2019), 8-12 July 2019, Rio de Janeiro, Brazil.
9th International Congress on Industrial and Applied Mathematics (ICIAM 2019), 15-19 July 2019, Valencia, Spain.
Householder Symposium XXI, 14-19 June 2020, Hotel Sierra Silvana, Selva di Fasano, Bari, Italy.
23rd Conference of the International Linear Algebra Society (ILAS 2020), 22-26 June 2020, National University of Ireland, Galway.
Mathematical Congress of the Americas, 19-23 July 2021, Buenos Aires, Argentina.

Some outside math-related opinions of note:

Maths spying: The quandary of working for the spooks, from The New Scientist, April 2014.

A letter to the editor of the New York Times

I wrote about the mathematics of voting. 16 October 2016.

My latest research papers are

René Kehl, Reinhard Nabben, and Daniel B. Szyld, Adaptive Multilevel Krylov Methods, Research Report 17-06-24,June 2017. Bibtex

José C. Garay, Frédéric Magoulès, Daniel B. Szyld, Optimized Schwarz Method for Poisson's Equation in Rectangular Domains, Research Report 17-05-19 May 2017. Revised June 2017 and July 2017. Bibtex

José C. Garay, Frédéric Magoulès, Daniel B. Szyld, Convergence of Asynchronous Optimized Schwarz Methods in the plane, Research Report 17-05-17 May 2017. Bibtex

Andreas Frommer, Kathryn Lund, Daniel B. Szyld, Block Krylov subspace methods for functions of matrices, Research Report 17-03-21, March 2017. Revised July 2017. To appear in Electronic Transactions on Numerical Analysis. Bibtex
Software avalable at Gitlab

Carlos Echeverría, Joerg Liesen, Daniel B. Szyld, and Petr Tichý, Convergence of the multiplicative Schwarz method for singularly perturbed convection-diffusion problems discretized on a Shishkin mesh. Research Report 17-1-10, January 2017. Bibtex

Micheael L. Parks, Kirk M. Soodhalter, and Daniel B. Szyld, A block Recycled GMRES method with investigations into aspects of solver performance, Research Report 16-04-04, April 2016. Revised August 2017. Available also at the arxiv. Bibtex
Supplementary Materials.
Software for block Recycled GMRES is available at Zenodo.

Tania Bakhos, Peter K. Kitanidis, Scott Ladenheim, Arvind K. Saibaba, and Daniel B. Szyld, Multipreconditioned GMRES for Shifted Systems, Research Report 16-03-31, March 2016. Revised Novermber 2016. Available also at the arxiv. To appear in SIAM Journal on Scientific Computing. Bibtex


Andreas Frommer, Kathryn Lund, Marcel Schweitzer, and Daniel B. Szyld, The Radau-Lanczos method for matrix functions, SIAM Journal on Matrix Analysis and Applications, vol. 38 (2017) pp. 710-732. Bibtex

Frédéric Magoulès, Daniel B. Szyld, and Cèdric Venet, Asynchronous Optimized Schwarz Methods with and without Overlap, Numerische Mathematik, vol. 137 (2017) pp. 199-227. Bibtex
Link to a presentation on some of this work at the SIAM Conference on Applied Linear Algebra 2015

Mian Ilyas Ahmad, Daniel B. Szyld, and Martin B. van Gijzen, Preconditioned multishift BiCG for H2-optimal model reduction, SIAM Journal on Matrix Analysis and Applications, vol. 38 (2017) pp. 401-424. Bibtex

Chen Greif, Tyrone Rees, and Daniel B. Szyld, GMRES with multiple preconditioners, SeMA Journal: Boletín de la Sociedad Española de Matemática Aplicada, vol. 74 (2017) pp. 213-231. Bibtex
Software for Multi-preconditioned GMRES available at the Matlab file exchange.


Hartwig Anzt, Edmond Chow, Daniel B. Szyld, and Jack Dongarra, Domain Overlap for Iterative Sparse Triangular Solves on GPUs, in Software for Exascale Computing, SPPEXA 2013-2015. Hans-Joachim Bungartz, Philipp Neumann, Wolfgang E. Nagel, eds. Lecture Notes in Computational Science and Engineering, Springer, Berlin and Heidelberg, 2016. Pages 527-545. Bibtex

Stephen D. Shank, Valeria Simoncini, and Daniel B. Szyld, Efficient low-rank solutions of generalized Lyapunov equations, Numerische Mathematik vol. 134 (2016) pp. 327-342. Bibtex

Daniel B. Szyld and Fei Xue, Preconditioned eigensolvers for large-scale nonlinear Hermitian eigenproblems with variational characterizations. I. External eigenvalues, Mathematics of Computation, vol. 85 (2016) pp. 2887-2918. Bibtex

Prince Chidyagwai, Scott Ladenheim , and Daniel B. Szyld, Constraint Preconditioning for the Coupled Stokes-Darcy System, SIAM Journal on Scientific Computing, vol. 38 (2016) pp. A668-A690. Bibtex

Work on most of these papers was supported in part by the the National Science Foundation.

Other Papers: Chronological . By subject.
See also the Proceedings of Seminar on Web Information Retrieval and Other Applications of Markov Chain Modeling
Complete CV (Temple format) or shorter CV. Google scholar profile.
Current PhD student supervision at Temple:
José Garay
Kathryn Lund

Links to former students and postdocs

Honors and Awards.
Commemorative medal of the School of Mathematics and Physics, Charles University of Prague, at the Czech-U.S. Workshop on Iterative Methods and Parallel Computing, June 16-21, 1997, Milovy, Czech Republic.
Featured in the book Hall of Fame containing linocuts portraits of scientists in the field of scientific computing made by Henk van der Vorst. Publishd by SARA, the High Performance Computing Agency of the Netherlands, December 2010.
Dean's Distinguished Award for Excellence in Research, College of Science and Technology, Temple University, October 2011.
Fellow of the American Mathematical Society, Class of 2017.
Fellow of the Society of Industrial and Applied Mathematics, Class of 2017. (A note from the College's news on these two recognitions).

Scientific Societies.
American Mathematical Society (AMS).
Asociación Argenitina de Matemática Aplicada, Computational e Industrial (ASAMCI) .
Association for Women in Mathematics (AWM).
GAMM Activity Group on Applied and Numerical Linear Algebra .
International Linear Algebra Society (ILAS).
Mathematical Council of the Americas.
National Association of Mathematicians (NAM).
Society of Industrial and Applied Mathematics (SIAM). Check this video clip: Why be a SIAM member?
SIAM Activity Group on Linear Algebra.
Unión Matemática de América Latina y el Caribe (UMALCA).
Check also the pages for Domain Decomposition Methods, the NA-Digest, and for the Householder Symposia.

Two great resources: Why do math?, What's Happening in the Mathematical Sciences?.

Links to some good friends and colleagues

I am a member of the Union of Concerned Scientists (UCS).
Faculty at Temple U. is unionized, our Union (TAUP) is part of the American Federation of Teachers (AFL-CIO).
I like to read The Nation; see also This can't be happening. I like to listen to Pacifica Radio, and Democracy Now!
Links to the Washington Office on Latin America (WOLA), the Council for Hemispheric Affairs (COHA), and to NACLA (North American Congress on Latin America).
Link to an honest commemoration of 50 years of the American War in Vietnam
Go to the Department of Mathematics Home Page

Last updated: 22 May August