首先在一般Banach空间中对渐近非扩张型左可逆半群给出了两个不动点存在性定理.同时利用这些结果,得到了渐近非扩张型左可逆半群迭代序列的强收敛定理.主要结果将一些已知结果推广至非Lipschitzian左可逆半群的情形,而且即使在交换半群情形它们也是新的.
This paper first provides two existence theorems of fixed points for left reversible semigroups of asymptotically nonexpansive type mappings in general Banach spaces. Using these results, the authors also obtain a strong convergence theorem of iterative sequences for left reversible semigroups of asymptotically nonexpansive type mappings. The results extend some known results to the case of the left reversible semigroups of non-Lipschitzian mappings and they are new even in the case of commutative semigroups.