THE BEST APPROXIMATION AND COINCIDENCE THEOREMS FOR COMPOSITES OF ACYCLIC MAPPINGS  

作　　者：丁协平 

出　　处：《Applied Mathematics and Mechanics(English Edition)》1999年第5期23-32,共10页应用数学和力学（英文版）

摘　　要：Some new coincidence theorem s involving a new class of set_valued mappings containing composites of acyclic mappings defined in a contractible space are proved. For applications, some best approximation theorems and coincidence theorems for set-valued mappings are als o given. A number of known results in recent literature are improved and general ized by the theorems in this paper.Some new coincidence theorem s involving a new class of set_valued mappings containing composites of acyclic mappings defined in a contractible space are proved. For applications, some best approximation theorems and coincidence theorems for set-valued mappings are als o given. A number of known results in recent literature are improved and general ized by the theorems in this paper.

关 键 词：coincidence theorems the best  approximation contractible space composites of acyclic mappings 

分 类 号：O157.9[理学—数学]