搜索结果: 1-11 共查到“知识库 泛函分析 approximation”相关记录11条 . 查询时间(0.028 秒)
Estimates for approximation numbers of some classes of composition operators on the Hardy space
approximation numbers Blaschke product composition operator cusp map Hardy space modulus of continuity Schatten classes
2012/6/21
We give estimates for the approximation numbers of composition operators on $H^2$, in terms of some modulus of continuity. For symbols whose image is contained in a polygon, we get that these approxim...
On approximation by ∆- convex polyhedron support functions
Weierstrass theorem function approximation weakly continuous function weakly compact set normed semigroup ∆ convex polyhedron support function
2011/10/20
The classical Weierstrass theorem states that every continuous function f defined ona compact set K▲Rn can be uniformly approximated by polynomials. In this paper we show firstthat it is again valid i...
On the approximation of a polytope by its dual $L_{p}$-centroid bodies
centroid bodies floating bodies polytopes Lp Brunn Minkowski theory
2011/9/14
Abstract: We show that the rate of convergence on the approximation of volumes of a convex symmetric polytope P in R^n by its dual L_{p$-centroid bodies is independent of the geometry of P. In particu...
Approximation of Fourier Integral Operators by Gabor multipliers
Fourier Integral operators modulation spaces short-time Fourier transform Gabor multipliers
2011/9/1
Abstract: A general principle says that the matrix of a Fourier integral operator with respect to wave packets is concentrated near the curve of propagation. We prove a precise version of this princip...
On p-Compact mappings and p-approximation
p-compact sets holomorphic mappings approximation properties
2011/8/30
Abstract: The notion of $p$-compact sets arises naturally from Grothendieck's characterization of compact sets as those contained in the convex hull of a norm null sequence. The definition, due to Sin...
Some approximation properties of Lupa\cs $q$-analogue of Bernstein operators
q-Bernstein polynomials Lupa¸ s q-analogue Voronovskaja-type
2011/2/23
In this paper, we discuss rates of convergence for the Lupa¸s q-analogue of Bernstein
polynomials Rn,q. We prove a quantitative variant of Voronovskaja’s theorem for Rn,q.
On the Approximation of Nonlinear Evolution Equations in Particular C*-Algebras of Operators
Nonlinear Evolution Equations Particular C*-algebras Discretizable Hilbert spaces
2011/2/25
In this article we deal with the approximation of solutions of non-linear evolution equations of the form A(u(t))+f(u(t)) = u′(t), the numerical analysis of solutions to this problems will be performe...
Particle approximation of the intensity measures of a spatial branching point process arising in multi-target tracking
Spatial branching processes multi-target tracking problems
2011/2/25
The aim of this paper is two-fold. First we analyze the sequence of intensity measures of a spatial branching point process arising in a multiple target tracking context. We study its stability proper...
On the Approximation of Contractive Semigroups of Operators in Discretizable Hilbert Spaces
Contractive Semigroups Evolution Equations Discretizable Hilbert Space
2011/2/25
The Computation of discrete Contractive semigroups becomes necessary when we deal with several types of evolution equations in Discretiz-able Hilbert spaces, in this work we study some properties of t...
Pointwise Simultaneous Approximation by Combinations of Baskakov Operators
Baskakov operator combination simultaneous approximation modulus of smoothness
2007/12/11
In this paper, we investigate the relation between the rate of convergence for the derivatives of the combinations of Baskakov operators and the smoothness for the derivatives of the functions approxi...
Coincidence Theorems with Applications to Minimax Inequalities, Section Theorem, Best Approximation and Multiobjective Games in Topological Spaces
admissible set-valued mapping generalized $R$-KKM mapping transfer compactly open-valued compactly local intersection property multiobjective game
2007/12/11
Some new coincidence theorems involving admissible set-valued mappings are proved in general noncompact topological spaces. As applications, some new minimax inequalities, section theorem, best approx...