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Author: Literature
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German[de]
(g 0 f)-1 (Tn ) = f- 1(g-1(Tn ») = f- 1(Sm) = Ri Topologische Abbildung : (M; T) und (N ; S) seien topologische Räume.
English[en]
(g 0 f)-1(Tn ) = f- 1(g-1(Tn )) = f- 1(Sm) = Rj Topological mapping : Let (M ; T) and (N ; S) be topological spaces.