集值函数空间中的Korovkin系统

THE KOROVKIN SYSTEM OF SETVALUED FUNCTIONS SPACES

把集值Korovkin型定理从Conov（Rn）推广到自反空间X的弱紧凸子集全体K所成的集合，将KlassKeimei和WalterRoth的工作推广。在此基础上，建立集值函数逼近度、逼近阶估计的量化形式。

Give a extension of kovovkin type approximation theorem from Conv (Rn) to weakly compact subsets of self-- reciprocal space X and exlended the results of Klass Keimei and Walter Roth.