M-星形度量空间中的最佳逼近和不动点定理

Best Approximation and Fixed Points in M Starshped Metric Spaces

在Ｍ－星形度量空间中研究最佳逼近的不动点定理，得到两个不动点定理和两个最佳逼近不动点的存在定理，该文的定理改进和推广了Ｍ．Ａ．

Abstract This paper studied theorems of fixed points of best approximation inM Starshaped matric spaces, botained two fixed point theorems and two theorems of existence of fixed points of best approximation. These theorems improve and generalize results of M.A.Al Thagafi, etc, and unify several known results.