Coleman, Patrick J. On the composition semigroup generated by complement and an expansive function. (English) Zbl 0152.39602 Nieuw Arch. Wiskd., III. Ser. 15, 207-210 (1967). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page MSC: 54B20 Hyperspaces in general topology 54C99 Maps and general types of topological spaces defined by maps Keywords:topology PDFBibTeX XMLCite \textit{P. J. Coleman}, Nieuw Arch. Wiskd., III. Ser. 15, 207--210 (1967; Zbl 0152.39602)