本文研究M—PN空间中“一集压缩算子0〈u〈1拓扑度的计算问题,并且利用半闭1-集压缩算子的拓扑度理论研究一类非线性算子方程的解的存在性问题.最后,我们给出定理2.1的一个具体应用.
In this paper, we investigate some new calculating problems of the topological degree of u -set-contractive operators (0 〈 u 〈 1) in M-PN spaces, and study a class of nonlinear operator equations by means of the topological degree of semi-closed 1-set-contractive operators. Finally, an example is given to show the application of Theorem 2.1.