Upscaling of mixed finite element discretization problems by the spectral AMGe method DZ Kalchev, CS Lee, U Villa, Y Efendiev, PS Vassilevski
SIAM Journal on Scientific Computing 38 (5), A2912-A2933, 2016
20 2016 Two-Level Adaptive Algebraic Multigrid for a Sequence of Problems with Slowly Varying Random Coefficients D Kalchev, C Ketelsen, PS Vassilevski
SIAM Journal on Scientific Computing 35 (6), B1215-B1234, 2013
12 2013 Adaptive Algebraic Multigrid for Finite Element Elliptic Equations with Random Coefficients D Kalchev
Master's thesis, Sofia University, Bulgaria; Technical report LLNL-TR-553254 …, 2012
11 2012 A least‐squares finite element method based on the Helmholtz decomposition for hyperbolic balance laws DZ Kalchev, TA Manteuffel
Numerical Methods for Partial Differential Equations 36 (6), 1418-1445, 2020
5 2020 Auxiliary Space Preconditioning of Finite Element Equations Using a Nonconforming Interior Penalty Reformulation and Static Condensation DZ Kalchev, PS Vassilevski
SIAM Journal on Scientific Computing 42 (3), A1741-A1764, 2020
5 2020 Mixed DZ Kalchev, TA Manteuffel, S Münzenmaier
Numerical Linear Algebra with Applications 25 (3), e2150, 2018
5 2018 Breaking the Molecular Dynamics Timescale Barrier Using a Wafer-Scale System K Santos, S Moore, T Oppelstrup, A Sharifian, I Sharapov, A Thompson, ...
SC24: International Conference for High Performance Computing, Networking …, 2024
4 2024 Accurate Coarse-Scale AMG-Based Finite Volume Reservoir Simulations in Highly Heterogeneous Media AT Barker, DZ Kalchev, ID Mishev, PS Vassilevski, Y Yang
SPE Reservoir Simulation Symposium, 2015
4 2015 Parallel Element-Based Algebraic Multigrid for ur l) and DZ Kalchev, PS Vassilevski, U Villa
SIAM Journal on Scientific Computing 45 (3), S371-S400, 2023
3 2023 Comparative Performance Analysis of Coarse Solvers for Algebraic Multigrid on Multicore and Manycore Architectures A Druinsky, P Ghysels, XS Li, O Marques, S Williams, A Barker, D Kalchev, ...
Parallel Processing and Applied Mathematics, 116-127, 2015
3 2015 A Condensed Constrained Nonconforming Mortar-based Approach for Preconditioning Finite Element Discretization Problems DZ Kalchev, P Vassilevski
SIAM Journal on Scientific Computing 42 (5), A3136-A3156, 2020
2 2020 Dual-Norm Least-Squares Finite Element Methods for Hyperbolic Problems DZ Kalchev
PhD thesis, University of Colorado at Boulder, Department of Applied Mathematics, 2018
2 2018 Tuning the Coarse Space Construction in a Spectral AMG Solver O Marques, A Druinsky, XS Li, AT Barker, P Vassilevski, D Kalchev
Procedia Computer Science, International Conference on Computational Science …, 2016
2 2016 On ParELAG's Parallel Element-based Algebraic Multigrid and its MFEM Miniapps for H(curl) and H(div) Problems: a report including lowest and next to the lowest order numerical … DZ Kalchev, PS Vassilevski, U Villa
Lawrence Livermore National Lab.(LLNL), Livermore, CA (United States …, 2021
1 2021 Breaking the mold: Overcoming the time constraints of molecular dynamics on general-purpose hardware D Perez, A Thompson, S Moore, T Oppelstrup, I Sharapov, K Santos, ...
The Journal of Chemical Physics 162 (7), 2025
2025 Scalable Multilevel Monte Carlo Methods Exploiting Parallel Redistribution on Coarse Levels HR Fairbanks, DZ Kalchev, CS Lee, PS Vassilevski
arXiv preprint arXiv:2408.02241, 2024
2024 MULTILEVEL MONTE CARLO (MLMC) SIMULATIONS: PERFORMANCE RESULTS FOR SPE10 (XY SLICES) D Kalchev, PS Vassilevski
Lawrence Livermore National Lab.(LLNL), Livermore, CA (United States), 2016
2016 Adaptive Multilevel AMG for Sequences of Problems with Gradually Changing Random Coefficients D Kalchev, C Ketelsen, P Vassilevski
Lawrence Livermore National Laboratory, Livermore, CA, USA, 2013
2013 