Center for Computing Research (CCR)

Center for Computing Research

Christopher Siefert (Chris)

Christopher Siefert (Chris)
Scalable Algorithms
Email: csiefer@sandia.gov
Phone: 505/844-4696
Fax: 505/844-0918

Mailing address:
Sandia National Laboratories
P.O. Box 5800, MS 1322
Albuquerque, NM
87185-1320

Chris Siefert is a Senior R&D Staff Member in the Computational Multiphysics group at Sandia National Laboratories. His research interests include preconditioners and linear solvers, algebraic multigrid, extended finite elements (XFEM) and discretization techniques for computational electromagnetics. Chris is a member of the Trilinos team and works on MueLu/ML, Ifpack2/Ifpack and Tpetra/Epetra. He is also a member of the ALEGRA team.

Chris' main Sandia website can be found at: www.sandia.gov/~csiefer/.

Education/Background

Ph.D., Computer Science w/ Computational Science and Engineering Option, University of Illinois at Urbana-Champaign, 2006.
B.S., Computer Science and Mathematics, College of William and Mary, 2000.

Projects

Software

Trilinos

Selected Publications & Presentations

2020	Hu, Jonathan J., Christian Alexander Glusa, Stan Gerald Moore, Paul Lin, Edward Geoffrey Phillips, Matthew Tyler Bettencourt, James Elliott, Christopher Siefert, Sivasankaran Rajamanickam, "Linear Solvers for Plasma Simulations on Advanced Architectures," Conference Paper, SIAM Conference on Parallel Processing in Seattle, WA, USA, February 2020.
2019	Siefert, Christopher, "Machine Learning for Linear Solvers," Presentation, Sandia Machine Learning and Deep Learning Workshop, August 2019.
2018	Becker, Gauthier, Christopher Siefert, Raymond S. Tuminaro, Huafei Sun, Dakshina Valiveti, Aruna Mohan, Jichao Yin, Hao Huang, "High resolution viscous gingering simulation in miscible displacement using a p-adaptive discontinuous Galerkin method with algebraic multigrid preconditioner," Journal Article, Journal of Computational Physics, Vol. 374, No. 1, pp. 495–514, Accepted/Published December 2018.
2017	Siefert, Christopher, Logan Meredith, Duncan Alisdair Odum McGregor, "Computation of Derived Variables for the Eddy Current Maxwell’s Equations," Presentation, SIAM CSE 2017, February 2017.
2016	Ballard, Grey, Christopher Siefert, Jonathan J. Hu, "Reducing Communication Costs for Sparse Matrix Multiplication within Algebraic Multigrid," Journal Article, SIAM Journal on Scientific Computing, Vol. 38, No. 3, pp. C203–C231, Accepted/Published June 2016. Prokopenko, Andrey, Christopher Siefert, Jonathan J. Hu, Mark Frederick Hoemmen, Alicia Marie Klinvex, "Ifpack2 User’s Guide 1.0," SAND Report, June 2016.
2015	Siefert, Christopher, Richard Michael Jack Kramer, Pavel B. Bochev, Thomas E. Voth, "Extended and Conformal Decomposition Finite Elements for 3D Compatible Discretizations," Presentation, SIAM CSE 2015, March 2015.
2014	Kramer, Richard, Pavel Bochev, Christopher Siefert, Thomas Voth, "Algebraically constrained extended edge element method (eXFEM-AC) for resolution of multi-material cells," Journal Article, Journal of Computational Physics, Vol. 276, pp. 596–612, Accepted/Published November 2014. Lin, Paul, Matthew Tyler Bettencourt, Stefan P. Domino, Travis C. Fisher, Mark Frederick Hoemmen, Jonathan J. Hu, Eric T. Phipps, Andrey Prokopenko, Sivasankaran Rajamanickam, Christopher Siefert, Eric Christopher Cyr, Stephen Ray Kennon, "Towards extreme-scale simulations with next-generation Trilinos: a low Mach fluid application case study ," Conference Paper, Workshop on Large-Scale Parallel Processing/28th IEEE International Parallel & Distributed Processing Symposium (IPDPS2014), May 2014. Siefert, Chris, Raymond S. Tuminaro, Axel Gerstenberger, Guglielmo Scovazzi, Samuel Scott Collis, "Algebraic Multigrid techniques for Discontinuous Galerkin Methods with varying polynomial order," Journal Article, Computational Geosciences, Accepted/Published August 2014.
2013	Kramer, Richard M. J., Pavel B. Bochev, Christopher M. Siefert, Thomas E. Voth, "An eXtended Finite Element Method with Algebraic Constraints (XFEM-AC) for problems with weak discontinuities," Journal Article, Computer Methods in Applied Mechanics and Engineering, Vol. 266, pp. 70–80, Accepted/Published August 2013.
2012	Hu, Jonathan J, Jeremie Gaidamour, Chris M Siefert, Ray S Tuminaro, "Design Considerations for a Flexible Multigrid Preconditioning Library," Journal Article, Scientific Programming, Vol. 20, No. 3, pp. 223–239, Accepted/Published August 2012. Pawlowski, Roger, Eric Phipps, Andy Salinger, Stephen Owen, Chris Siefert, Matthew Staten, "Automating embedded analysis capabilities and managing software complexity in multiphysics simulation, Part II: Application to partial differential equations ," Journal Article, Journal of Scientific Programming, Vol. 20, No. 3, pp. 327–345, Accepted/Published August 2012.
2011	Bochev, Pavel B., Kara J. Peterson, Christopher Siefert, "Analysis and Computation of Compatible Least-Squares Methods for Div-Curl Equations," Journal Article, SIAM Journal on Numerical Analysis, Vol. 49, No. 1, pp. 159–181, Accepted/Published February 2011. Hu, Jonathan J, Jeremie Gaidamour, Axel Gerstenberger, Chris Siefert, Ray Tuminaro, Tobias Wiesner, "MueLu: A Framework for Developing Scalable Multigrid Preconditioners ," Presentation, SuperComputing 2011, November 2011.
2010	Siefert, Christopher M, Pavel B Bochev, Kara J Peterson, "Multigrid Scalability for Least Squares Finite Element Problems," Poster, SIAM Parallel Processing 2010, February 2010.
2009	Siefert, Christopher M., Allen C. Robinson, "A Fully Implicit Method for 3D Quasi-Steady State Magnetic Advection-Diffusion," SAND Report, September 2009.
2008	Bochev, Pavel B, Jonathan J Hu, Christopher M Siefert, Raymond S Tuminaro, "An Algebraic Multigrid Approach Based on a Compatible Gauge Reformulation of Maxwell's Equations," Journal Article, SIAM Journal on Scientific Computing, Vol. 31, No. 1, pp. 557–583, Accepted/Published October 2008.
2007	Bochev, Pavel B., Christopher M. Siefert, Ray S. Tuminaro, Jinchao Xu, Yunrong Zhu, "Compatible Gauge Approaches for H(div) Equations," SAND Report, August 2007.
2006	Siefert, Christopher M, Eric de Sturler, "Probing Methods for Saddle-Point problems," Journal Article, Electonic Transactions in Numerical Analysis, Vol. 22, pp. 163–183, Accepted/Published April 2006.

Awards & Recognition


2013	Siefert, Christopher M, Society/Professional Leadership, Chair of the SIAM Professional Development Working Group, SIAM, January 1, 2013 – December 31, 2013.