Found 2,079 Documents (Results 1–100)
A modified block preconditioner for complex symmetric indefinite linear systems. (English) Zbl 07922836
Sine transform based preconditioning for an inverse source problem of time-space fractional diffusion equations. (English) Zbl 07909822
An adaptive preconditioning scheme for the self-consistent field iteration and generalized stacking fault energy calculations. (English) Zbl 07901346
Sparsifiable spectral equivalence of DtN mapping and its application to elliptic problems. (English) Zbl 07900326
A preconditioned alternating minimization framework for nonconvex and half quadratic regularization. (English) Zbl 07896901
A class of new extended generalized shift-splitting preconditioners for \(3\times 3\) block saddle point problems. (English) Zbl 07893874
Preconditioned weighted full orthogonalization method for solving singular linear systems from PageRank problems. (English) Zbl 07893427
Preconditioning techniques of all-at-once systems for multi-term time-fractional diffusion equations. (English) Zbl 07891507
A parallel-in-time preconditioner for Crank-Nicolson discretization of a parabolic optimal control problem. (English) Zbl 07890936
A global space-time Trefftz DG scheme for the time-dependent isotropic elastic wave equations. (English) Zbl 1542.65170
A \(\tau \)-preconditioner for space fractional diffusion equation with non-separable variable coefficients. (English) Zbl 07880211
A new inexact fixed point iteration method for solving tensor absolute value equation. (English) Zbl 07879157
Uniform preconditioners for high order finite element approximations of planar linear elasticity. (English) Zbl 07872153
A new preconditioned nonlinear conjugate gradient method in real arithmetic for computing the ground states of rotational Bose-Einstein condensate. (English) Zbl 07860851
A fast cosine transformation accelerated method for predicting effective thermal conductivity. (English) Zbl 1539.65147
Novel and efficient implementation of multi-level fast multipole indirect BEM for industrial Helmholtz problems. (English) Zbl 07855262
An augmentation preconditioner for a class of complex symmetric linear systems. (English) Zbl 07853486
Fully algebraic domain decomposition preconditioners with adaptive spectral bounds. (English) Zbl 07846109
R. Chan’s circulant-based approximate inverse preconditioning iterative method for solving second-order space fractional advection-dispersion equations with variable coefficients. (English) Zbl 07841104
An efficient multiscale preconditioner for large-scale highly heterogeneous flow. (English) Zbl 07837056
Reused LU factorization as a preconditioner for efficient solution of the parabolized stability equations. (English) Zbl 07832222
MSC:
76-XX
Modified restrictive preconditioners for double saddle point problems arising from liquid crystal director modeling. (English) Zbl 07830974
A preconditioned iterative interior point approach to the conic bundle subproblem. (English) Zbl 07829612
Non-overlapping domain decomposition algorithms with only primal velocity unknowns for the discontinuous viscosity Stokes problem. (English) Zbl 07829108
MSC:
65Nxx
A class of refined preconditioners with sparse error correction for BEM linear system. (English) Zbl 1536.65033
An adaptive preconditioner for three-dimensional single-phase compressible flow in highly heterogeneous porous media. (English) Zbl 1534.65262
Algebraic inverse fast multipole method: a fast direct solver that is better than HODLR based fast direct solver. (English) Zbl 07811315
The Helmholtz equation with uncertainties in the wavenumber. (English) Zbl 1533.65233
Reviewer: Xue Jiang (Beijing)
BDDC preconditioners for virtual element approximations of the three-dimensional Stokes equations. (English) Zbl 1533.65244
Reviewer: Steven B. Damelin (Ann Arbor)
Fractional centered difference schemes and banded preconditioners for nonlinear Riesz space variable-order fractional diffusion equations. (English) Zbl 1535.65142
Reviewer: Gianluca Frasca-Caccia (Fisciano)
Multi-parameter dimensional split preconditioner for three-by-three block system of linear equations. (English) Zbl 1537.65024
Well-posedness and finite element approximation of mixed dimensional partial differential equations. (English) Zbl 1530.65165
A new diagonal and Toeplitz splitting preconditioning method for solving time-dependent Riesz space-fractional diffusion equations. (English) Zbl 1531.65047
Preconditioners based on matrix splitting for the structured systems from elliptic PDE-constrained optimization problems. (English) Zbl 07764784
A accelerated modified shift-splitting method for nonsymmetric saddle point problems. (English) Zbl 07920422
A preconditioned iterative method for coupled fractional partial differential equation in European option pricing. (English) Zbl 07919420
A note on matrix reordering for linear system solutions by iterative methods in interior point methods. (English) Zbl 07914440
Grothe, Oliver (ed.) et al., Operations research proceedings 2022. Selected papers of the annual international conference of the German Operations Research Society (GOR), Karlsruhe, Germany, September 6–9, 2022. Cham: Springer. Lect. Notes Oper. Res., 79-85 (2023).
MSC:
90Cxx
A non-overlapping domain decomposition method for a discontinuous Galerkin method: a numerical study. (English) Zbl 07849593
A fully-implicit numerical algorithm of two-fluid two-phase flow model using Jacobian-free Newton-Krylov method. (English) Zbl 07847138
A matrix-free parallel solution method for the three-dimensional heterogeneous Helmholtz equation. (English) Zbl 1529.65107
A conforming auxiliary space preconditioner for the mass conserving stress-yielding method. (English) Zbl 07790626
A family of immersed finite element spaces and applications to three-dimensional \(\mathbf{H}(\operatorname{curl})\) interface problems. (English) Zbl 1530.65158
Iterative pure source transfer domain decomposition methods for Helmholtz equations in heterogeneous media. (English) Zbl 1538.65585
On the solution of the distributed optimal control problem with time-periodic parabolic equations. (English) Zbl 1538.65072
PinT preconditioner for forward-backward evolutionary equations. (English) Zbl 1530.65114
MSC:
65M55
65F08
65F10
65F22
65F15
65J20
65H10
49M41
65M06
65L06
65M12
65M15
65Y05
15B05
93B05
93B20
Robust and efficient preconditioners for Stokes-Darcy problems. (English) Zbl 1534.65226
Franck, Emmanuel (ed.) et al., Finite volumes for complex applications X – Volume 1. Elliptic and parabolic problems. FVCA 10, Strasbourg, France, October 30 – November 3, 2023. Invited contributions. Cham: Springer. Springer Proc. Math. Stat. 432, 375-383 (2023).
Reviewer: Song Jiang (Beijing)
A low-rank update for relaxed Schur complement preconditioners in fluid flow problems. (English) Zbl 07780859
Block preconditioners for energy stable schemes of magnetohydrodynamics equations. (English) Zbl 1531.65187
Hybridized discontinuous Galerkin/hybrid mixed methods for a multiple network poroelasticity model with application in biomechanics. (English) Zbl 07779188
Preconditioned algorithm for difference of convex functions with applications to graph Ginzburg-Landau model. (English) Zbl 1538.65159
Two-parameter block triangular splitting preconditioner for block two-by-two linear systems. (English) Zbl 1538.65058
Semi-regularized Hermitian and skew-Hermitian splitting preconditioning for saddle-point linear systems. (English) Zbl 1538.65069
Preconditioned fourth-order exponential integrator for two-dimensional nonlinear fractional Ginzburg-Landau equation. (English) Zbl 1538.65293
On a Calderón preconditioner for the symmetric formulation of the electroencephalography forward problem without barycentric refinements. (English) Zbl 07771290
An energy-conserving Fourier particle-in-cell method with asymptotic-preserving preconditioner for Vlasov-Ampère system with exact curl-free constraint. (English) Zbl 07766247
Convergence of the Hiptmair-Xu preconditioner for \(H(\mathbf{curl})\)-elliptic problems with jump coefficients. II: Main results. (English) Zbl 1527.65127
Reviewer: Bülent Karasözen (Ankara)
A dimension expanded preconditioning technique for block two-by-two linear equations. (English) Zbl 1526.65004
A two-level additive Schwarz preconditioner for the Nitsche extended finite element approximation of elliptic interface problems. (English) Zbl 1538.65505
Parallel matrix-free polynomial preconditioners with application to flow simulations in discrete fracture networks. (English) Zbl 1538.65095
Optimal geometric multigrid preconditioners for HDG-P0 schemes for the reaction-diffusion equation and the generalized Stokes equations. (English) Zbl 1529.65125
Reviewer: Temur A. Jangveladze (Tbilisi)
Comparison of block preconditioners for the Stokes problem with discontinuous viscosity and friction. (English) Zbl 1533.65227
Wyrzykowski, Roman (ed.) et al., Parallel processing and applied mathematics. 14th international conference, PPAM 2022, Gdansk, Poland, September 11–14, 2022. Revised selected papers. Part II. Cham: Springer. Lect. Notes Comput. Sci. 13827, 323-330 (2023).
On \(\tau\)-preconditioner for a novel fourth-order difference scheme of two-dimensional Riesz space-fractional diffusion equations. (English) Zbl 1538.65246
A fast ADI based matrix splitting preconditioning method for the high dimensional space fractional diffusion equations in conservative form. (English) Zbl 1538.65274
Interpretation of parareal as a two-level additive Schwarz in time preconditioner and its acceleration with GMRES. (English) Zbl 1523.65031
Robust BPX preconditioner for fractional Laplacians on bounded Lipschitz domains. (English) Zbl 1521.65123
Sine transform based preconditioning techniques for space fractional diffusion equations. (English) Zbl 07729591
Uniform block-diagonal preconditioners for divergence-conforming HDG methods for the generalized Stokes equations and the linear elasticity equations. (English) Zbl 07726047
MSC:
65-XX
Recycling basic columns of the splitting preconditioner in interior point methods. (English) Zbl 1532.90143
MSC:
90C51
An \(\alpha\)-robust fast algorithm for distributed-order time-space fractional diffusion equation with weakly singular solution. (English) Zbl 1540.65333
A semi matrix-free twogrid preconditioner for the Helmholtz equation with near optimal shifts. (English) Zbl 1518.35247
A preconditioning method with auxiliary crack tip subproblems for dynamic crack propagation based on XFEM. (English) Zbl 1539.74478
Convergence analysis of space-time domain decomposition method for parabolic equations. (English) Zbl 1538.65330
A Kronecker product linear-cost solver for the high-order generalized-\(\alpha\) method for multi-dimensional hyperbolic systems. (English) Zbl 1538.74077
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