سال انتشار: ۱۳۸۶

محل انتشار: سی و هشتمین کنفرانس ریاضی ایران

تعداد صفحات: ۱

نویسنده(ها):

S.M S.MODARRES – Department of Mathematics, Yazd University, Yazd, Iran
A SHAHSAVAN – Department of Mathematics, Yazd University, Yazd, Iran

چکیده:

In this research, PA(B), BP(A), P(A,B) for two closed subsets of normed space X and normality of A relative to B are defined. Also, the best approximation of a subset normal on a subset of X, and double best approximation are verfied.