Results 11 to 20 of about 1,388,848 (321)
Algebraic Solution of Tropical Best Approximation Problems [PDF]
Mathematics, 2023 We introduce new discrete best approximation problems, formulated and solved in the framework of tropical algebra, which deals with semirings and semifields with idempotent addition.
Nikolai Krivulin
doaj +2 more sources
Convergence of best best 𝐿_{∞}-approximations [PDF]
Proceedings of the American Mathematical Society, 1981 Let ( Ω , A , μ ) (\Omega , \mathcal {A}, \mu ) be a probability space and let { B i } i = 1 ∞
Abdallah M. Al-Rashed, R. B. Darst
openalex +2 more sources
Best approximation of functions in generalized Hölder class [PDF]
Journal of Inequalities and Applications, 2018 Here, for the first time, error estimation of the functions g∈Hz(w) $g\in H_{z}^{(w)}$ and g˜∈Hz(w) $\tilde{g}\in H_{z}^{(w)}$ classes using TC1 $TC^{1}$ method of F. S. (Fourier Series) and C. F. S.
H. K. Nigam, Md. Hadish
doaj +2 more sources
Counterexamples in best approximation [PDF]
Proceedings of the American Mathematical Society, 1976 Several counterexamples for approximation to continuous functions by polynomials are given. One example shows that the points of maximum deviation of a continuous real valued function on an interval from its polynomial of degree n n of best uniform approximation can lie on any monotone sequence contained in that interval for ...
S. J. Poreda
openalex +3 more sources
Best Co-Approximation In Weighted Space [PDF]
مجلة جامعة الانبار للعلوم الصرفة, 2022 In this paper, we present best co- approximation in weighted space. The results considered are these of existence of functions of best co- approximation, specifications of co-a proximal and specification co- Chebyshev subspaces.
Alaa Auad, Alaa Hussain
doaj +1 more source
Existence of invariant points and applications to simultaneous approximation [PDF]
Bulletin of Natural Sciences Research, 2022 For the set of e-simultaneous approximation and e-simultaneous coapproximation, we derive certain Brosowski-Meinardus type invariant point results in this paper.
Chandok Sumit, Narang T. D.
doaj +1 more source
Best Simultaneous Diophantine Approximations under a Constraint on the Denominator [PDF]
, 2005 We investigate the problem of best simultaneous Diophantine approximation under a constraint on the denominator, as proposed by Jurkat. New lower estimates for optimal approximation constants are given in terms of critical determinants of suitable star ...
Iskander Aliev, Peter M. Gruber
openalex +6 more sources
Karpatsʹkì Matematičnì Publìkacìï, 2023 Exact order estimates for some characteristics of linear and nonlinear approximation of the isotropic Nikol'skii-Besov classes $\mathbf{B}^r_{p,\theta}$ of periodic multivariate functions in the spaces $B_{q,1}$, $1\leq q \leq \infty$, are obtained ...
A.S. Romanyuk +3 more
doaj +1 more source
Best comonotone approximation [PDF]
Transactions of the American Mathematical Society, 1994 The authors have described a general theory of best comonotone approximation in \(C[a,b]\) by elements of an \(n\)-dimensional extended Chebyshev subspace. Two theorems on characterizations are studied which seem to be useful for the actual computation of best comonotone approximations.
Deutsch, Frank, Zhong, Jun
openaire +1 more source
New estimates related with the best polynomial approximation
Journal of Numerical Analysis and Approximation Theory, 2023 In some old results, we find estimates the best approximation \(E_{n,p}(f)\) of a periodic function satisfying \(f^{(r)}\in\mathbb{L}^p_{2\pi}\) in terms of the norm of \(f^{(r)}\) (Favard inequality).
Jorge Bustamante
doaj +1 more source