default search action
Google
Google Scholar
Semantic Scholar
Internet Archive Scholar
CiteSeerX
ORCIDRaytcho D. Lazarov
Person information
SPARQL queries 
Refine list
refinements active!
zoomed in on ?? of ?? records
view refined list in
export refined list as
showing all ?? records
2020 – today
- 2020
[j53]Stanislav Harizanov
, Raytcho D. Lazarov, Svetozar Margenov, Pencho Marinov:
Numerical solution of fractional diffusion-reaction problems based on BURA. Comput. Math. Appl. 80(2): 316-331 (2020)- [j52]Raytcho D. Lazarov, Piotr P. Matus, Petr N. Vabishchevich:
Modern Problems of Numerical Analysis. On the Centenary of the Birth of Alexander Andreevich Samarskii. Comput. Methods Appl. Math. 20(4): 591-594 (2020) - [j51]Stanislav Harizanov, Raytcho D. Lazarov, Svetozar Margenov, Pencho Marinov, Joseph E. Pasciak:
Analysis of numerical methods for spectral fractional elliptic equations based on the best uniform rational approximation. J. Comput. Phys. 408: 109285 (2020) - [i2]Stanislav Harizanov, Raytcho D. Lazarov, Svetozar Margenov:
A Survey on Numerical Methods for Spectral Space-Fractional Diffusion Problems. CoRR abs/2010.02717 (2020)
2010 – 2019
- 2019
- [i1]Stanislav Harizanov, Raytcho D. Lazarov, Svetozar Margenov, Pencho Marinov:
The Best Uniform Rational Approximation: Applications to Solving Equations Involving Fractional powers of Elliptic Operators. CoRR abs/1910.13865 (2019) - 2018
- [j50]Beiping Duan, Bangti Jin, Raytcho D. Lazarov, Joseph E. Pasciak, Zhi Zhou:
Space-Time Petrov-Galerkin FEM for Fractional Diffusion Problems. Comput. Methods Appl. Math. 18(1): 1-20 (2018) - [j49]Raytcho D. Lazarov, Aziz Takhirov:
A note on the uniform inf-sup condition for the Brinkman problem in highly heterogeneous media. J. Comput. Appl. Math. 340: 537-545 (2018) - [j48]Stanislav Harizanov, Raytcho D. Lazarov, Svetozar Margenov, Pencho Marinov, Yavor Vutov:
Optimal solvers for linear systems with fractional powers of sparse SPD matrices. Numer. Linear Algebra Appl. 25(5) (2018) - 2017
- [j47]Bangti Jin, Raytcho D. Lazarov, Petr N. Vabishchevich:
Preface: Numerical Analysis of Fractional Differential Equations. Comput. Methods Appl. Math. 17(4): 643-646 (2017) - [j46]Guido Kanschat, Raytcho D. Lazarov, Youli Mao:
Geometric Multigrid for Darcy and Brinkman models of flows in highly heterogeneous porous media: A numerical study. J. Comput. Appl. Math. 310: 174-185 (2017) - [j45]Bangti Jin, Raytcho D. Lazarov, Vidar Thomée, Zhi Zhou:
On nonnegativity preservation in finite element methods for subdiffusion equations. Math. Comput. 86(307): 2239-2260 (2017) - 2016
- [j44]Shriram Srinivasan, Raytcho D. Lazarov, Peter D. Minev:
Multiscale direction-splitting algorithms for parabolic equations with highly heterogeneous coefficients. Comput. Math. Appl. 72(6): 1641-1654 (2016) - [j43]Bangti Jin, Raytcho D. Lazarov, Xiliang Lu, Zhi Zhou:
A simple finite element method for boundary value problems with a Riemann-Liouville derivative. J. Comput. Appl. Math. 293: 94-111 (2016) - [j42]Bangti Jin, Raytcho D. Lazarov, Zhi Zhou:
A Petrov-Galerkin Finite Element Method for Fractional Convection-Diffusion Equations. SIAM J. Numer. Anal. 54(1): 481-503 (2016) - [j41]Bangti Jin, Raytcho D. Lazarov, Zhi Zhou:
Two Fully Discrete Schemes for Fractional Diffusion and Diffusion-Wave Equations with Nonsmooth Data. SIAM J. Sci. Comput. 38(1) (2016) - [j40]Johannes K. Kraus, Raytcho D. Lazarov, Maria Lymbery, Svetozar Margenov, Ludmil T. Zikatanov:
Preconditioning Heterogeneous H(div) Problems by Additive Schur Complement Approximation and Applications. SIAM J. Sci. Comput. 38(2) (2016) - 2015
- [j39]Bangti Jin, Raytcho D. Lazarov, Yikan Liu, Zhi Zhou:
The Galerkin finite element method for a multi-term time-fractional diffusion equation. J. Comput. Phys. 281: 825-843 (2015) - [j38]Bangti Jin, Raytcho D. Lazarov, Joseph E. Pasciak, William Rundell:
Variational formulation of problems involving fractional order differential operators. Math. Comput. 84(296): 2665-2700 (2015) - [j37]Emilia G. Bazhlekova, Bangti Jin, Raytcho D. Lazarov, Zhi Zhou:
An analysis of the Rayleigh-Stokes problem for a generalized second-grade fluid. Numerische Mathematik 131(1): 1-31 (2015) - [j36]Yalchin Efendiev, Raytcho D. Lazarov, Ke Shi:
A Multiscale HDG Method for Second Order Elliptic Equations. Part I. Polynomial and Homogenization-Based Multiscale Spaces. SIAM J. Numer. Anal. 53(1): 342-369 (2015) - 2014
- [j35]Bangti Jin, Raytcho D. Lazarov, Joseph E. Pasciak, Zhi Zhou:
Error Analysis of a Finite Element Method for the Space-Fractional Parabolic Equation. SIAM J. Numer. Anal. 52(5): 2272-2294 (2014) - 2013
- [j34]Panagiotis Chatzipantelidis, Raytcho D. Lazarov, Vidar Thomée:
Some Error Estimates for the Finite Volume Element Method for a Parabolic Problem. Comput. Methods Appl. Math. 13(3): 251-279 (2013) - [j33]Yalchin Efendiev, Juan Galvis, Raytcho D. Lazarov, M. Moon, Marcus Sarkis:
Generalized multiscale finite element method. Symmetric interior penalty coupling. J. Comput. Phys. 255: 1-15 (2013) - [j32]Bangti Jin, Raytcho D. Lazarov, Zhi Zhou:
Error Estimates for a Semidiscrete Finite Element Method for Fractional Order Parabolic Equations. SIAM J. Numer. Anal. 51(1): 445-466 (2013) - [c12]Yalchin Efendiev, Juan Galvis, Raytcho D. Lazarov, Steffen Weißer:
Mixed FEM for Second Order Elliptic Problems on Polygonal Meshes with BEM-Based Spaces. LSSC 2013: 331-338 - [p1]Yalchin Efendiev, Juan Galvis, Raytcho D. Lazarov, Svetozar Margenov, Jun Ren:
Multiscale Domain Decomposition Preconditioners for Anisotropic High-Contrast Problems. Domain Decomposition Methods in Science and Engineering XX 2013: 289-296 - 2012
- [j31]Yalchin Efendiev, Juan Galvis, Raytcho D. Lazarov, Svetozar Margenov, Jun Ren:
Robust Two-level Domain Decomposition Preconditioners for High-contrast Anisotropic Flows in Multiscale Media. Comput. Methods Appl. Math. 12(4): 415-436 (2012) - [j30]Panagiotis Chatzipantelidis, Raytcho D. Lazarov, Vidar Thomée:
Some error estimates for the lumped mass finite element method for a parabolic problem. Math. Comput. 81(277): 1-20 (2012) - [c11]Bangti Jin, Raytcho D. Lazarov, Joseph E. Pasciak, Zhi Zhou:
Galerkin FEM for Fractional Order Parabolic Equations with Initial Data in H - s , 0 ≤ s ≤ 1. NAA 2012: 24-37 - 2011
- [j29]Oleg P. Iliev, Raytcho D. Lazarov, Joerg Willems:
Variational Multiscale Finite Element Method for Flows in Highly Porous Media. Multiscale Model. Simul. 9(4): 1350-1372 (2011) - [c10]Yalchin Efendiev, Juan Galvis, Raytcho D. Lazarov, Joerg Willems:
Robust Solvers for Symmetric Positive Definite Operators and Weighted Poincaré Inequalities. LSSC 2011: 43-51 - 2010
- [j28]Oleg Iliev, Raytcho D. Lazarov, Joerg Willems:
Fast numerical upscaling of heat equation for fibrous materials. Comput. Vis. Sci. 13(6): 275-285 (2010) - [j27]Craig C. Douglas, Yalchin Efendiev, Richard E. Ewing, Victor Ginting, Raytcho D. Lazarov, Martin J. Cole, Greg Jones:
Least squares approach for initial data recovery in dynamic data-driven applications simulations. Comput. Vis. Sci. 13(8): 365-375 (2010)
2000 – 2009
- 2009
- [j26]Bernardo Cockburn, Jayadeep Gopalakrishnan, Raytcho D. Lazarov:
Unified Hybridization of Discontinuous Galerkin, Mixed, and Continuous Galerkin Methods for Second Order Elliptic Problems. SIAM J. Numer. Anal. 47(2): 1319-1365 (2009) - [j25]Rajen Kumar Sinha, Richard E. Ewing, Raytcho D. Lazarov:
Mixed Finite Element Approximations of Parabolic Integro-Differential Equations with Nonsmooth Initial Data. SIAM J. Numer. Anal. 47(5): 3269-3292 (2009) - [j24]Richard E. Ewing, Oleg Iliev, Raytcho D. Lazarov, Irina Rybak, Joerg Willems:
A Simplified Method for Upscaling Composite Materials with High Contrast of the Conductivity. SIAM J. Sci. Comput. 31(4): 2568-2586 (2009) - [c9]Oleg P. Iliev, Raytcho D. Lazarov, Joerg Willems:
Discontinuous Galerkin Subgrid Finite Element Method for Heterogeneous Brinkman's Equations. LSSC 2009: 14-25 - 2007
- [j23]Raytcho D. Lazarov, Svetozar Margenov:
CBS constants for multilevel splitting of graph-Laplacian and application to preconditioning of discontinuous Galerkin systems. J. Complex. 23(4-6): 498-515 (2007) - [j22]Raytcho D. Lazarov, Shuai Lu, Sergei V. Pereverzev:
On the balancing principle for some problems of Numerical Analysis. Numerische Mathematik 106(4): 659-689 (2007) - 2006
- [j21]Craig C. Douglas, Yalchin Efendiev, Richard E. Ewing, Victor Ginting, Raytcho D. Lazarov:
Dynamic Data Driven Simulations in Stochastic Environments. Computing 77(4): 321-333 (2006) - [j20]Raytcho D. Lazarov, Joseph E. Pasciak, Guan Qin:
On the occasion of the sixtieth birthday of Richard E. Ewing. Numer. Linear Algebra Appl. 13(9): 675-676 (2006) - [j19]Veselin Dobrev, Raytcho D. Lazarov, Panayot S. Vassilevski, Ludmil T. Zikatanov:
Two-level preconditioning of discontinuous Galerkin approximations of second-order elliptic equations. Numer. Linear Algebra Appl. 13(9): 753-770 (2006) - [j18]Rajen Kumar Sinha, Richard E. Ewing, Raytcho D. Lazarov:
Some new error estimates of a semidiscrete finite volume element method for a parabolic integro-differential equation with nonsmooth initial data. SIAM J. Numer. Anal. 43(6): 2320-2343 (2006) - [c8]Craig C. Douglas, J. Clay Harris, Mohamed Iskandarani, Chris R. Johnson, Robert A. Lodder, Steven G. Parker, Martin J. Cole, Richard E. Ewing, Yalchin Efendiev, Raytcho D. Lazarov, Guan Qin:
Dynamic Contaminant Identification in Water. International Conference on Computational Science (3) 2006: 393-400 - 2005
- [j17]Raytcho D. Lazarov:
Higher-order finite element methods. Math. Comput. 74(250) (2005) - [j16]Panagiotis Chatzipantelidis, Victor Ginting, Raytcho D. Lazarov:
A finite volume element method for a non-linear elliptic problem. Numer. Linear Algebra Appl. 12(5-6): 515-546 (2005) - [j15]Panagiotis Chatzipantelidis, Raytcho D. Lazarov:
Error Estimates for a Finite Volume Element Method for Elliptic PDEs in Nonconvex Polygonal Domains. SIAM J. Numer. Anal. 42(5): 1932-1958 (2005) - [j14]Carsten Carstensen, Raytcho D. Lazarov, Stanimire Tomov:
Explicit and Averaging A Posteriori Error Estimates for Adaptive Finite Volume Methods. SIAM J. Numer. Anal. 42(6): 2496-2521 (2005) - [c7]Craig C. Douglas, Yalchin Efendiev, Richard E. Ewing, Victor Ginting, Raytcho D. Lazarov, Martin J. Cole, Greg Jones, Chris R. Johnson:
Multiscale Interpolation, Backward in Time Error Analysis for Data-Driven Contaminant Simulation. International Conference on Computational Science (2) 2005: 640-647 - [c6]Andrey B. Andreev, Raytcho D. Lazarov, Milena R. Racheva:
Postprocessing and Improved Accuracy of the Lowest-Order Mixed Finite Element Approximation for Biharmonic Eigenvalues. LSSC 2005: 613-620 - 2004
- [c5]Craig C. Douglas, Chad E. Shannon, Yalchin Efendiev, Richard E. Ewing, Victor Ginting, Raytcho D. Lazarov, Martin J. Cole, Greg Jones, Chris R. Johnson, Jennifer Simpson:
A Note on Data-Driven Contaminant Simulation. International Conference on Computational Science 2004: 701-708 - 2003
- [j13]Raytcho D. Lazarov, Joseph E. Pasciak, Joachim Schöberl, Panayot S. Vassilevski:
Almost optimal interior penalty discontinuous approximations of symmetric elliptic problems on non-matching grids. Numerische Mathematik 96(2): 295-315 (2003) - [c4]Craig C. Douglas, Yalchin Efendiev, Richard E. Ewing, Raytcho D. Lazarov, Martin J. Cole, Greg Jones, Chris R. Johnson:
Virtual Telemetry for Dynamic Data-Driven Application Simulations. International Conference on Computational Science 2003: 279-288 - 2002
- [c3]Raytcho D. Lazarov, Svetozar Margenov:
On a Two-Level Parallel MIC(0) Preconditioning of Crouzeix-Raviart Non-conforming FEM Systems. Numerical Methods and Application 2002: 192-204 - 2001
- [j12]Raytcho D. Lazarov, Joseph E. Pasciak, Panayot S. Vassilevski:
Iterative solution of a coupled mixed and standard Galerkin discretization method for elliptic problems. Numer. Linear Algebra Appl. 8(1): 13-31 (2001) - [j11]Chisup Kim, Raytcho D. Lazarov, Joseph E. Pasciak, Panayot S. Vassilevski:
Multiplier Spaces for the Mortar Finite Element Method in Three Dimensions. SIAM J. Numer. Anal. 39(2): 519-538 (2001) - [j10]Richard E. Ewing, Oleg P. Iliev, Raytcho D. Lazarov:
A Modified Finite Volume Approximation of Second-Order Elliptic Equations with Discontinuous Coefficients. SIAM J. Sci. Comput. 23(4): 1335-1351 (2001) - 2000
- [j9]Richard E. Ewing, Raytcho D. Lazarov, Yanping Lin:
Finite Volume Element Approximations of Nonlocal in Time One-Dimensional Flows in Porous Media. Computing 64(2): 157-182 (2000)
1990 – 1999
- 1999
- [c2]Raytcho D. Lazarov, Joseph E. Pasciak, Panayot S. Vassilevski:
Mixed Finite Element Methods for Elliptic Problems on Non-Matching Grids. LSSC 1999: 25-35 - 1997
- [j8]James H. Bramble, Raytcho D. Lazarov, Joseph E. Pasciak:
A least-squares approach based on a discrete minus one inner product for first order systems. Math. Comput. 66(219): 935-955 (1997) - 1996
- [j7]Zhangxin Chen, Richard E. Ewing, Raytcho D. Lazarov:
Domain decomposition algorithms for mixed methods for second-order elliptic problems. Math. Comput. 65(214): 467-490 (1996) - [j6]Panayot S. Vassilevski, Raytcho D. Lazarov:
Preconditioning Mixed Finite Element Saddle-point Elliptic Problems. Numer. Linear Algebra Appl. 3(1): 1-20 (1996) - [j5]Zhangxin Chen, Richard E. Ewing, Raytcho D. Lazarov, Serguei Maliassov, Yuri A. Kuznetsov:
Multilevel Preconditioners for Mixed Methods for Second Order Elliptic Problems. Numer. Linear Algebra Appl. 3(5): 427-453 (1996) - 1994
- [j4]Richard E. Ewing, Raytcho D. Lazarov, Panayot S. Vassilevski:
Local refinement techniques for elliptic problems on cell-centered grids; II. Optimal order two-grid iterative methods. Numer. Linear Algebra Appl. 1(4): 337-368 (1994) - 1993
- [j3]Atanas I. Pehlivanov, Graham F. Carey, Raytcho D. Lazarov, Y. Shen:
Convergence analysis of least-squares mixed finite elements. Computing 51(2): 111-123 (1993) - 1992
- [j2]Panayot S. Vassilevski, Svetozara I. Petrova, Raytcho D. Lazarov:
Finite Difference Schemes on Triangular Cell-Centered Grids with Local Refinement. SIAM J. Sci. Comput. 13(6): 1287-1313 (1992) - 1990
- [j1]Richard E. Ewing, Raytcho D. Lazarov, Panayot S. Vassilevski:
Finite difference schemes on grids with local refinement in time and space for parabolic problems I. Derivation, stability, and error analysis. Computing 45(3): 193-215 (1990)
1980 – 1989
- 1987
- [c1]Raytcho D. Lazarov, Panayot S. Vassilevski, Svetozar Margenov:
Solving Elliptic Problems by the Domain Decomposition Method Using Proconditioning Matrices Derived by Multilevel Splitting of the Finite Element Matrix. ICS 1987: 826-835
Coauthor Index
manage site settings
To protect your privacy, all features that rely on external API calls from your browser are turned off by default. You need to opt-in for them to become active. All settings here will be stored as cookies with your web browser. For more information see our F.A.Q.
Unpaywalled article links
Add open access links from 
to the list of external document links (if available).
Privacy notice: By enabling the option above, your browser will contact the API of unpaywall.org to load hyperlinks to open access articles. Although we do not have any reason to believe that your call will be tracked, we do not have any control over how the remote server uses your data. So please proceed with care and consider checking the Unpaywall privacy policy.
Archived links via Wayback Machine
For web page which are no longer available, try to retrieve content from the 
of the Internet Archive (if available).
Privacy notice: By enabling the option above, your browser will contact the API of archive.org to check for archived content of web pages that are no longer available. Although we do not have any reason to believe that your call will be tracked, we do not have any control over how the remote server uses your data. So please proceed with care and consider checking the Internet Archive privacy policy.
Reference lists
Add a list of references from 
, 
, and 
to record detail pages.
load references from crossref.org and opencitations.net
Privacy notice: By enabling the option above, your browser will contact the APIs of crossref.org, opencitations.net, and semanticscholar.org to load article reference information. Although we do not have any reason to believe that your call will be tracked, we do not have any control over how the remote server uses your data. So please proceed with care and consider checking the Crossref privacy policy and the OpenCitations privacy policy, as well as the AI2 Privacy Policy covering Semantic Scholar.
Citation data
Add a list of citing articles from and to record detail pages.
load citations from opencitations.net
Privacy notice: By enabling the option above, your browser will contact the API of opencitations.net and semanticscholar.org to load citation information. Although we do not have any reason to believe that your call will be tracked, we do not have any control over how the remote server uses your data. So please proceed with care and consider checking the OpenCitations privacy policy as well as the AI2 Privacy Policy covering Semantic Scholar.
OpenAlex data
Load additional information about publications from 
.
Privacy notice: By enabling the option above, your browser will contact the API of openalex.org to load additional information. Although we do not have any reason to believe that your call will be tracked, we do not have any control over how the remote server uses your data. So please proceed with care and consider checking the information given by OpenAlex.
last updated on 2024-10-07 21:21 CEST by the dblp team
all metadata released as open data under CC0 1.0 license
see also: Terms of Use | Privacy Policy | Imprint
dblp was originally created in 1993 at:
since 2018, dblp has been operated and maintained by:
the dblp computer science bibliography is funded and supported by:
