在拓扑空间中,建立了广义L—KKM映射新的非空交定理,同时证明了集值映射的不动点定理.作为应用,得到了上下界(拟-)平衡问题的存在定理.其结果推广了最近文献中的结论.
The some new nonempty intersection theorems for generalized L-KKM mappings were established and some new fixed point theorems for set-valued mappings were proved under suitable conditions in topological spaces. As applications, an existence theorem for an equilihfium problem with lower and upper bounds and two existence theorems for a quasi-equilibrium problem with lower and upper bounds were obtained in topological spaces. The results generalize some known results in recent literature,