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Published online by Cambridge University Press: 22 January 2016
Let Q be a topological transformation group operating on the left of a topological space X. Let us denote by. B the orbit space and p : X → B the projection, p is a continuous and open map of X onto B. For an arbitrary abelian coefficient group G, the continuous map p induces homomorphisms
Presented to the American Mathematical Society, September 2, 1952. This work was done under Contract N7-ONR-434, Office of Naval Research.