关于单纯逼近的定义与Croom商榷

将 Croom 关于多面体之间的连续映射的单纯逼近的定义与一般通常采用的定义进行比较,指出这2种定义是不等价的,由于 Croom 的定义减弱了条件,不要求满足星形性质,因而不能反映“逼近”的程度,致使应用该定义时不得不补足条件.

Inverse Theorem of Approximation in L_p for the Stancu Integral-type Operators on a Simplex

In this paper, the integral-type Stancu operators on a simplex is considered and its inverse theorem of approximation in Lp（1≤ p 〈＋∞）has been obtained.