Results 21 to 30 of about 48,526 (265)

On Best Approximations in Hyperconvex Spaces [PDF]

Journal of Function Spaces, 2021
In this manuscript, we present further extensions of the best approximation theorem in hyperconvex spaces obtained by Khamsi.
Reny George, Zoran D. Mitrović, Hassen Aydi   +2 more
openaire   +2 more sources

Space–time proper generalized decompositions for the resolution of transient elastodynamic models [PDF]

, 2013
In this paper, we investigate ability of proper generalized decomposition (PGD) to solve transient elastodynamic models in space–time domain. Classical methods use time integration schemes and an incremental resolution process.
BOUCINHA, Lucas, AMMAR, Amine, GRAVOUIL, Anthony   +2 more
core   +1 more source

Topological Structures of IVF Approximation Spaces

Fuzzy Information and Engineering, 2016
An approximation space is a key concept in rough set theory, which plays an important role to approximate reasoning about data. An interval-valued fuzzy (IVF, for short) approximation space is an approximation space in the IVF environment. In this paper,
Gang-Qiang Zhang
doaj   +1 more source

Finite element approximation of a nonlinear cross-diffusion population model [PDF]

, 2003
We consider a fully discrete finite element approximation of the nonlinear cross-diffusion population model: Find u i, the population of the ith species, i = 1 and 2, such that ∂ui ∂t −Δ [ ci ui + ai u2i + ui uj] − bi ∇.
John W. Barrett, Blowey, J.F., James F. Blowey, Blowey, JF, Barrett, J.W., John W. Barrett, Barrett, JW   +6 more
core   +1 more source

Schwarz iterative methods: Infinite space splittings

, 2022
S.121-139We prove the convergence of greedy and randomized versions of Schwarz iterative methods for solving linear elliptic variational problems based on infinite space splittings of a Hilbert space.
Oswald, P., Griebel, M.
core   +1 more source

Approximation of Rough Soft Set and Its Application to Lattice

Fuzzy Information and Engineering, 2015
The approximation of soft set is presented in modified soft rough (MSR) approximation space in this paper, i.e., approximation of an information system with respect to another information one.
Sankar Kumar Roy, Susanta Bera
doaj   +1 more source

A New Single-Valued Neutrosophic Rough Sets and Related Topology

Journal of Mathematics, 2021
(Fuzzy) rough sets are closely related to (fuzzy) topologies. Neutrosophic rough sets and neutrosophic topologies are extensions of (fuzzy) rough sets and (fuzzy) topologies, respectively. In this paper, a new type of neutrosophic rough sets is presented,
Qiu Jin, Kai Hu, Chunxin Bo, Lingqiang Li   +3 more
doaj   +1 more source

Deterministic Bi-Criteria Model for Solving Stochastic Mixed Vector Variational Inequality Problems

Mathematics, 2023
In this paper, we consider stochastic mixed vector variational inequality problems. Firstly, we present an equivalent form for the stochastic mixed vector variational inequality problems.
Meiju Luo, Menghan Du, Yue Zhang
doaj   +1 more source

Algorithms and error bounds for multivariate piecewise constant approximation

, 2010
We review the surprisingly rich theory of approximation of functions of many vari- ables by piecewise constants. This covers for example the Sobolev-Poincar´e inequalities, parts of the theory of nonlinear approximation, Haar wavelets and tree ...
Oleg Davydov, Davydov, Oleg
core   +1 more source

On Proximity Spaces Constructed on Rough Sets

Axioms
Based on equivalence relation R on X, equivalence class [x] of a point and equivalence class [A] of a subset represent the neighborhoods of x and A, respectively.
Jong Il Baek, S. E. Abbas, Kul Hur, Ismail Ibedou   +3 more
doaj   +1 more source