Equivalent theorems on simultaneous approximation by combinations of Gamma operators

In this paper,some equivalent theorems on simultaneous approximation for combinations of Gamma operators by weighted moduli of smoothness ωr(4)λ(f,t)w(4)s(O≤λ≤1)are given.The relation between derivatives of combinations of Gamma operators and smoothness of derivatives of functions is also investigated.     

QUANTUM COMPLEXITY OF THE APPROXIMATION FOR THE CLASSES B（Wpr（[0, 1）d）） AND B（Hpr（[0, 1]d））

We study the approximation of functions from anisotropic Sobolev classes B(W_p~r([0,1]~d)) and H¨older-Nikolskii classes B(W_p~r([0,1]~d)) in the L q([0,1] d) norm with q ≤ p in the quantum model of computation.We determine the quantum query complexity of this problem up to logarithmic factors.It shows that the quantum algorithms are significantly better than the classical deterministic or randomized algorithms.     

新课程数学课堂教学设计中问题解决的有效性探究

1"问题解决"的含义关于"问题解决",主要有三种不同的理解:第一种理解把"问题解决"看成是一种教学手段,这是把"问题解决"从属于具体数学知识的教学,把"问题解决"当作一种背景,即通过问题来引入有关的教学内容,并通过问题解决来达到复习、巩固及检查的目的.第二种理解把"问题解决"看成是一种技     

误差与有效数字

介绍了误差与有效数字的基础知识，并通过实例讨论了在处理科技数据中如何确定有效数字。     

APPROXIMATION PROPERTIES OF （C, α） MEANS OF DOUBLE WALSH-FOURIER SERIES

We study the rate of Lp approximation by Cesaro means of the quadratic partial sums of double Walsh-Fourier series of functions from Lp.     

On Finite Groups with Some Semi Cover-Avoiding Subgroups

A subgroup H of a finite group G is said to have the semi-cover-avoiding property in G if there is a chief series of G such that H covers or avoids every chief factor of the series. In this paper, some new results are obtained based on the assumption that some subgroups have the semi-cover-avoiding property in the group.     

AN MRA YIELDS AN ORTHONORMAL WAVELET BASIS AN OPERATOR THEORETIC PROOF

Abstract. In this paper we show how to construct a scaling function and an orthonormal wavelet basis from a multiresolution approximation using an operator theoretic method.     

NON-ISOTROPIC JACOBI SPECTRAL METHODS FOR UNBOUNDED DOMAINS

Some specific non-isotropic Jacobi approximations in multiple-dimensions are investigated, which are used for numerical solutions of differential equations on various unbounded domains. The convergence of proposed schemes are proved. Some efficient algorithms are provided. Numerical results are presented to illustrate the efficiency of this new approach.