摘要
给出了Ｈｉｌｂｅｒｔ空间上非扩张映象的一个不动点定理，改进并推广了１９８２年，Ｄｕｑｕｎｄｊｉ和Ｇｒａｈａｓ在Ｈｉｌｂｅｒｔ空间中对非扩张映象给出的类似以于Ａｌｔｍａｎ定理的一个新的不动点定理相应的结果．
In this paper,a fixed point theorem fon non-expansive mapping is given in Hilbert space,corresponding results in reference [1] are generalized and improved.
