Daniel B. Szyld

Department of Mathematics
College of Science and Technology
Temple University
(038-16)
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:
SeMA Journal (published by Socieded Española de Matemática Aplicada, the Spanish Society of Applied Mathematics),
the Electronic Journal of Linear Algebra (ELA),
the Electronic Transactions on Numerical Analysis (ETNA) ( European mirror site),
Linear Algebra and its Applications,
Mathematics of Computation,
Numerical Linear Algebra with Applications,
Revue d'Analyse Numérique et de Théorie de l'Approximation (published by the Romanian Academy),
and the SIAM Journal on Matrix Analysis and Applications.

I am the Vice-President at Large of the Society of Industrial and Applied Mathematics (SIAM) [conflict of interest statement]. See my recent blog entry in the SIAM Blogs page.
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:

Gene Golub SIAM Summer School: Randomization in Numerical Linear Algebra, 15-26 June 2015, Delphi, Greece.
C.I.M.E. Foundation Summer School on "Exploiting Hidden Structure in Matrix Computations. Algorithms and Applications," 21-26 June 2015, Hotel S. Michele in Cetraro (Calabria), Italy.
26th Biennial Numerical Analysis Conference, 23-26 June 2015, University of Strathclyde, Glasgow, Scotland.
XXIII International Conference on Domain Decomposition Methods, 6-10 July 2015, Jeju Island, Korea.
GAMM Activity Group Applied and Numerical Linear Algebra Workshop on Large-Scale Network Computations, 9-10 July 2015, Max-Planck Institute Magdeburg, Germany.
2015 AARMS Workshop on Domain Decomposition Methods for PDEs, 3-8 August 2015, Halifax, Canada.
8th International Congress on Industrial and Applied Mathematics (ICIAM 2015), 10-14 August 2015, Beijing, China.
International conference on Matrix Methods in Mathematics and Applications, 24-28 August 2015, Moscow, Russia.
New Directions in Numerical Computation, 25-28 August 2015, University of Oxford, UK.
Numerical Methods for Large-Scale Nonlinear Problems and Their Applications, 31 August-4 September 2015, ICERN, Providence, Rhodes Island.
Workshop on matrix theory, MatTriad 2015, 7-11 September 2015, Coimbra, Portugal.
Workshop on Matrix Equations and Tensor Techniques, 21-22 September 2015, Bologna, Italy.
SIAM Conference on Applied Linear Algebra, 26-30 October 2015, Atlanta.
Mid Atlantic Numerical Analysis Day, 13 November 2015, Temple University, Philadelphia.
Fifth International Conference on Matrices and Applications (ICMA), 18-20 December 2015, Nova Southeastern University, Fort Lauderdale, Florida.
Workshop on Tensor Decompositions and Applications, 18-22 January 2016, Leuven, Belgium.
ALGORITMY 2016, 13-18 March 2016, Podbanske, High Tatra Mountains, Slovakia.
The Fourteenth Copper Mountain Conference on Iterative Methods, 20-25 March 2016, Colorado.
SIAM Workshop on Combinatorial Scientific Computing (CSC16), 10-12 October 2016, Albuquerque, New Mexico.
Householder Symposium XX, 18-23 June 2017, Blacksburg, Virgina.
Mathematical Congress of the Americas, 23-28 July 2017, Montreal, Canada.

Some outside math-related opinions of note:

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

My latest research papers are

Daniel B. Szyld, Eugene Vecharynski, and Fei Xue, Preconditioned eigensolvers for large-scale nonlinear Hermitian eigenproblems with variational characterizations. II. Interior eigenvalues, Research Report 15-04-10, Department of Mathematics, Temple University, April 2015. Bibtex
This paper is also abvalable at the Arxiv:1504.02811 [math.NA].

Stephen D. Shank, Valeria Simoncini, and Daniel B. Szyld, Efficient low-rank solutions of generalized Lyapunov equations, Research Report 14-11-10, Department of Mathematics, Temple University, November 2014. Revised May 2015. Bibtex

Daniel B. Szyld and Fei Xue, Preconditioned eigensolvers for large-scale nonlinear Hermitian eigenproblems with variational characterizations. I. Conjugate gradient methods, Research Report 14-08-26, Department of Mathematics, Temple University, August 2014. Revised April 2015. To appear in Mathematics of Computation. Bibtex

Mian Ilyas Ahmad, Daniel B. Szyld, and Martin B. van Gijzen, Preconditioned multishift BiCG for H2-optimal model reduction, Research Report 12-06-15, Department of Mathematics, Temple University, June 2012. Revised March 2013 and June 2015. Bibtex

Chen Greif, Tyrone Rees, and Daniel B. Szyld, GMRES with multiple preconditioners, Research Report 11-12-23, Department of Mathematics, Temple University, December 2011. Revised September 2012, January 2014, and March 2015. Bibtex
Software for Multi-preconditioned GMRES available at the Matlab file exchange.

PUBLISHED IN 2015:

Sébastien Duminil, Hassane Sadok, and Daniel B. Szyld, Nonlinear Schwarz iterations with Reduced Rank Extrapolation, Applied Numerical Mathematics, vol. 94 (2015) pp. 209-221. Bibtex

Daniel B. Szyld and Fei Xue, Local convergence of Newton-like methods for degenerate eigenvalues of nonlinear eigenproblems, Research Report 12-10-04, Department of Mathematics, Temple University, October 2012. Published in revised form in two parts:
Part I. Classical Algorithms. Numerische Mathematik, vol. 129 (2015), pp. 353-381. Bibtex
Part II. Accelerated algorithms.
Numerische Mathematik, vol. 129 (2015), pp. 382-403. Bibtex

PUBLISHED IN 2014:

Lahcen Laayouni and Daniel B. Szyld, On the performance of the Algebraic Optimized Schwarz Methods with applications, Numerical Algorithms, vol. 67 (2014) pp. 889-916. Bibtex

Chen Greif, Tyrone Rees, and Daniel B. Szyld, Additive Schwarz with Variable Weights, Domain Decomposition Methods in Science and Engineering XXI . J. Erhel, M. Gander, L. Halpern, G. Pichot, T. Sassi, and O. Widlund, eds. Lecture Notes in Computer Science and Engineering, Vol. 98, Springer, Berlin and Heidelberg, 2014. Pages 661-668. Bibtex

Daniel B. Szyld and Fei Xue, Several properties of invariant pairs of nonlinear algebraic eigenvalue problems, IMA Journal of Numerical Anlysis, vol. 34 (2014), pp. 921-954. Bibtex

Valeria Simoncini, Daniel B. Szyld, and Marlliny Monsalve, On two numerical methods for the solution of large-scale algebraic Riccati equations, IMA Journal of Numerical Anlysis, vol. 34 (2014), pp. 904-920. Bibtex

Andreas Frommer and Daniel B. Szyld, On Necessary Conditions for Convergence of Stationary Iterative Methods for Hermitian Semidefinite Linear Systems, Linear Algebra and its Applications, vol. 453 (2014) pp. 192-201. Bibtex

Kirk M. Soodhalter, Daniel B. Szyld, and Fei Xue, Krylov Subspace Recycling for Sequences of Shifted Linear Systems , Applied Numerical Mathematics, vol. 81 (2014) pp. 105-118. Bibtex

Bryan Shader, Naomi Shaked-Monderer, and Daniel B. Szyld, Nearly positive matrices, Linear Algebra and its Applications, vol. 449 (2014) 520-544. Bibtex

Work on most of these papers was supported in part by the Department of Energy (Office of Science), and by 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
Scott Ladenheim (Picture)
Kathryn Lund

Current visitor:
Jieyong Zhou from the Applied Math Department, Shanghai University of Finance and Economics

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.


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: 12 April 2015