Zobrazeno 1 - 10
of 142
pro vyhledávání: '"SVETOZAR MARGENOV"'
Autor:
Svetozar Margenov, Dimitar Slavchev
Publikováno v:
Algorithms, Vol 17, Iss 10, p 453 (2024)
We study numerical methods and algorithms for time-dependent fractional-in-space diffusion problems. The considered anomalous diffusion is modelled by the fractional Laplacian (−Δ)α, 0<α<1, following the integral definition. Fractional diffusion
Externí odkaz:
https://doaj.org/article/c70f6d81428e4e08ba4f81d4fb180561
Autor:
Svetozar Margenov
Publikováno v:
Mathematics, Vol 12, Iss 14, p 2266 (2024)
In this paper, we develop a new Best Uniform Rational Approximation-Semi-Discrete (BURA-SD) method taking into account the singularities of the solution of fractional diffusion problems in polygonal domains. The complementary capabilities of the expo
Externí odkaz:
https://doaj.org/article/5395eae431e44de99513d623ba26d8ad
Publikováno v:
Mathematics, Vol 11, Iss 10, p 2238 (2023)
Bulgaria has the lowest COVID-19 vaccination rate in the European Union and the second-highest COVID-19 mortality rate in the world. That is why we think it is important better to understand the reason for this situation and to analyse the developmen
Externí odkaz:
https://doaj.org/article/410d2ff7793f4214b80a2110b57f7569
Publikováno v:
Mathematics, Vol 10, Iss 15, p 2570 (2022)
Data from the World Health Organization indicate that Bulgaria has the second-highest COVID-19 mortality rate in the world and the lowest vaccination rate in the European Union. In this context, to find the crucial epidemiological parameters that cha
Externí odkaz:
https://doaj.org/article/f0e62472e2fe4a38853ece5a46d8320d
Publikováno v:
Mathematics, Vol 10, Iss 13, p 2327 (2022)
A new class of high-performance preconditioned iterative solution methods for large-scale finite element method (FEM) elliptic systems is proposed and analyzed. The non-overlapping domain decomposition (DD) naturally introduces coupling operator at t
Externí odkaz:
https://doaj.org/article/5b6c8a85ea274c5a90f64088dab0f4aa
Publikováno v:
Mathematics, Vol 10, Iss 5, p 780 (2022)
Multiphysics or multiscale problems naturally involve coupling at interfaces which are manifolds of lower dimensions. The block-diagonal preconditioning of the related saddle-point systems is among the most efficient approaches for numerically solvin
Externí odkaz:
https://doaj.org/article/3c649204e494428b9100a1c10aa54116
Publikováno v:
Fractal and Fractional, Vol 5, Iss 3, p 61 (2021)
Numerical methods for spectral space-fractional elliptic equations are studied. The boundary value problem is defined in a bounded domain of general geometry, Ω⊂Rd, d∈{1,2,3}. Assuming that the finite difference method (FDM) or the finite elemen
Externí odkaz:
https://doaj.org/article/1a77485c8b0c4055be1bc12a4995b506
Autor:
SVETOZAR MARGENOV, YAVOR VUTOV
Publikováno v:
TASK Quarterly, Vol 11, Iss 1-2 (2007)
The presented comparative analysis concerns two iterative solvers for large-scale linear systems related to µFEM simulation of human bones. The considered scalar elliptic problems represent the strongly heterogeneous structure of real bone specimens
Externí odkaz:
https://doaj.org/article/1b09203d43d04450ad8b51882fb28dc1
Autor:
Johannes Kraus, Svetozar Margenov
This book deals with algorithms for the solution of linear systems of algebraic equations with large-scale sparse matrices, with a focus on problems that are obtained after discretization of partial differential equations using finite element methods
Autor:
Dimitar Slavchev, Svetozar Margenov
Publikováno v:
Numerical Methods and Applications ISBN: 9783031324116
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d2dd528764afb823d2f8fec891648e9a
https://doi.org/10.1007/978-3-031-32412-3_26
https://doi.org/10.1007/978-3-031-32412-3_26