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
19 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 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
5 2015 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 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
2 2023 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
2021 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 