Articles, Proceedings, Reports and Theses
R. Kramer, P. Bochev, C. Siefert and T. Voth. An extended finite element method with algebraic constraints (XFEMAC) for problems with weak discontinuities. Computer Methods in Applied Mechanics and Engineering, Volume 266, pp. 70—80, 2013.
R. Pawlowski, E. Phipps, A. Salinger, S. Owen, C. Siefert and M. Staten. Automating embedded analysis capabilities and managing software complexity in multiphysics simulation, Part II: Application to partial differential equations. Scientific Programming, Volume 20, Number 3, 2012.
J. Gaidamour, J. Hu, C. Siefert and R. Tuminaro. Design considerations for a flexible multigrid preconditioning library. Scientific Programming, Volume 20, Number 2, 2012.
C. Siefert, T. Voth and P. Bochev. Electromagnetic eXtended finite elements for accurate resolution of multimaterial cells. Proceedings of the ARL Research in Ballistic Protection Technologies Workshop, May 2012.
P. Bochev, K. Peterson and C. Siefert. Analysis and Computation of Compatible LeastSquares Methods for DivCurl Equations. SIAM Journal on Numerical Analysis, Volume 49, Number 1, pp. 159—181, 2011.
J. Lai, P. Bochev, L. Olson, K. Peterson, D. Ridzal, and C. Siefert.. Discontinuous Velocity Least Squares Finite Element Methods for Improved Mass Conservation. CSRI Summer Proceedings 2010, pp. 15—31, 2010.
N. Roberts, D. Ridzal, P. Bochev, L. Demkowicz, K. Peterson and C. Siefert.. Application of a Discontinuous PetrovGalerkin Method to the Stokes Equations. CSRI Summer Proceedings 2010, pp. 32—46, 2010.
C. Siefert and A. Robinson. A Fully Implicit Method for 3D QuasiSteady State Magnetic AdvectionDiffusion. SAND20096091, Sandia National Laboratories, September 2009.
J. Hu, C. Siefert, I. Karlin, R. Tuminaro, S. Domino and A. Robinson. Highly Scalable Linear Solvers on Thousands of Processors. SAND20096197, Sandia National Laboratories, September 2009.
P. Bochev, J. Hu, C. Siefert and R. Tuminaro. An Algebraic Multigrid Approach Based on a Compatible Gauge Reformulation of Maxwell's Equations. SIAM Journal on Scientific Computing, Volume 31, Issue 1, pp. 557—583, 2008.
P. Bochev, C. Siefert, R. Tuminaro, J. Xu and Y. Zhu. Compatible Gauge Approaches for H(div) Equations. Technical Report, SAND 20075384P, Sandia National Laboratories, August 2007.
M. Gee, C. Siefert, J. Hu, R. Tuminaro and M. Sala. ML 5.0 Smoothed Aggregation Users Guide. SAND20062649, Sandia National Laboratories, May 2006.
C. Siefert. Preconditioners for Generalized SaddlePoint Problems. PhD
Thesis, Department of Computer Science, UIUC, January 2006.
C. Siefert and E. de Sturler. Probing Methods for SaddlePoint Problems. Electronic Transactions in Numerical Analysis (ETNA),
Special Volume on Saddle Point Problems: Numerical Solution and
Applications, Volume 22, pp. 163—183, April 2006.
C. Siefert and E. de Sturler. Preconditioners for Generalized SaddlePoint Problems. SIAM Journal on Numerical Analysis, Volume 44, Number 3, pp. 1275—1296, 2006.
C. Siefert, V. Torczon and M.W. Trosset. ModelAssisted Pattern Search Methods for Optimizing Expensive Computer Simulations. Proceedings of the Section on Physical and Engineering Sciences,
American Statistical Association, 2002.
J. Liesen, E. de Sturler, A. Sheffer, Y. Aydin and C. Siefert. Efficient Computation of Planar Triangulations. Proceedings of the 10th International Meshing Roundtable, Newport Beach, CA, October 710, 2001.
C. Siefert. ModelAssisted Pattern Search. Undergraduate Honors Thesis, Accepted
with Highest Honors, Department of Computer Science, College of William
and Mary, May 2000.
Presentations + Posters (by Me)
Electrogramnetic eXtended finite elements for accurate resolution of multimaterial cells  Talk at ARL Research in Ballistics Protection Workshop [Aberdeen, MD], (May 2012).
Mimetic Least Squares Methods with Preconditioners for Darcy Flow  Talk at the 12th Copper Mountain Conference on Iterative Methods [Copper Mountain, CO], (March 2012).
SmoothedAggregation Algebraic Multigrid for Porous Media Simulations  Talk at SIAM Parallel Processing 2012 [Savannah, GA], (February 2012).
Block Preconditioning for Implicit Ocean Systems  Talk at the 7th International Congress on Industrial and Applied Mathematics (ICIAM), [Vancouver, BC], (July 2011).
Block Preconditioning for Implicit Ocean Models  Talk at the 11th Copper Mountain Conference on Iterative Methods [Copper Mountain, CO], (April 2010).
Multigrid Scalability for Least Squares Finite Element Problems  Poster at SIAM Parallel Processing 2010 [Seattle, WA], (February 2010).
Smoothed Aggregation AMG Solvers for LeastSquares Finite Element Systems  Talk at SIAM Applied Linear Algebra 2009 [Monterey, CA], (October 2009).
An Algebraic Multigrid Method for Compatible LeastSquares Formulations of DivCurl Equations  Talk at the 14th Copper Mountain Conference on Multigrid Methods [Copper Mountain, CO], (April 2009).
Partitioning for Multigrid Solvers  Invited Talk at the Workshop on Combinatorial Scientific Computing and Petascale Simulations (CSCAPES) [Santa Fe, NM], (June 2008).
Recent Algorithmic (and Practical) Developments in ML  Talk at the 10th Copper Mountain Conference on Iterative Methods [Copper Mountain, CO], (April 2008).
Introduction to Multilevel Solvers for the Physical Sciences  Invited CSUMS Lecture, College of William and Mary [Williamsburg, VA], (December 2007).
Algebraic Multigrid and a Compatible Gauge Reformulation of Maxwell's Equations  Invited Computer Science Seminar, College of William and Mary [Williamsburg, VA], (November 2007).
What's New in ML? New Features in Trilinos 8.0  Trilinos Users Group Meeting 2007 [Albuquerque, NM], (November 2007).
Algebraic Multigrid and Algebraic Reformulations of the Eddy Current Equations, Part II  Talk at the 13th Copper Mountain Conference on Multigrid Methods [Copper Mountain, CO], (March 2007).
Algebraic Multigrid and Algebraic Reformulations of the Eddy Current Equations  Invited Talk for CSE 2007 [Costa Mesa, CA], (February 2007).
What's New in ML? New Features in Trilinos 7.0  Trilinos Users Group Meeting 2006 [Albuquerque, NM], (November 2006).
AMG and a Discrete Reformulation for Maxwell's Equations  Computer Science Research Institute Seminar [Albuquerque, NM], (October 2006).
Probing Methods for Generalized SaddlePoint Problems  Talk at Preconditioning 2005 [Emory University, GA], (May 2005).
Generalized SaddlePoint Preconditioners and Approximate Schur Complements  Talk at CSE 2005 [Orlando, FL], (February 2005).
Preconditioners for Generalized SaddlePoint Problems  Talk at Midwest Numerical Analysis Day 2004 [UWMilwaukee, WI], (April 2004).
Preconditioners for Generalized, Stabilized SaddlePoint Problems  Contributed Talk at Preconditioning 2003 [Napa, CA], (October 2003).
ModelAssisted Pattern Search Methods for Optimizing Expensive Computer Simulations  Topic Contributed/Invited Talk at JSM 2002 [NYC], (August 2002).
MAPS: An algorithm for nonparametric Response Surface Methodology  Poster at SRCOS/ASA Conference (with A. Padula, V. Torczon and M. Trosset) [Williamsburg, VA], (Summer 2000).
ModelAssisted Pattern Search  Invited Talk at Sandia National Laboratories [Livermore, CA], (August 2000).
ModelAssisted Pattern Search  Invited Talk for the William and Mary Board of Visitors [Williamsburg, VA], (Spring 2000).
Presentations (by Others)
Scalability Consequences in Multimaterial Modeling  Conference/Workshop on Numerical Methods for Multimaterial Fluid Flows, Czech Technical University, [Prague, Czech Republic] (September 2007), by
A. Robinson.
Algebraic Multigrid and Algebraic Reformulations of the Eddy Current Equations, Part I  13th Copper Mountain Conference on Multigrid Methods [Copper Mountain, CO], (March 2007), by R. Tuminaro.
Goal Oriented Reduced Order Modeling in Structural Dynamics  Adaptive Model Reduction Methods for PDE Constrained Optimization, Rice University [Houston,
TX], (April 2006), by R. Lehoucq.
Probing for Schur Complements and Preconditioning Generalized SaddlePoint Problems  Optimization Technology Center and Northwestern University [Evanston,
IL], (October 2004), by E. de Sturler.
Preconditioners for Generalized SaddlePoint Problems  Department of Computer Science, University of Maryland [College Park,
MD], (December 2004), by E. de Sturler.
Preconditioners for Generalized SaddlePoint Problems  Solution Methods for SaddlePoint Systems in Computational Mechanics Workshop,
[Santa Fe, NM], (December 2003), by E. de Sturler.
ModelAssisted Pattern Search  First International Workshop on Surrogate Modelling and Space Mapping
for Engineering Optimization, [TU Denmark], (November 2000), by
V. Torczon.
