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A fixed point theorem for expansion mappings in metric spaces over topological semifields. (English) Zbl 0772.54040

Summary: We prove a fixed point theorem on expansion mappings. This theorem extends the theorems of S. Z. Wang, B. X. Li, Z. M. Gao and K. Iseki [Math. Jap. 29, 631-636 (1984; Zbl 0554.54023)] and T. Taniguchi [ibid. 34, No. 1, 139-142 (1989; Zbl 0677.54038)].

MSC:

54H25 Fixed-point and coincidence theorems (topological aspects)
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