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Published online by Cambridge University Press: 24 October 2008
In (2) the author determined a formula for computing, by means of the Eilenberg-Moore spectral sequence, the action of the group in a principal G-bundle, under the hypothesis that H*(G) be universally transgressively generated. This rather severe restriction was due to the method of proof, which used the theory of Guy Hirsch. Since Hirsch's work can be derived as a special case of Brown's twisted tensor products (3), one might hope to obtain the formula for the group action in the general case from the latter theory, and this we shall do (Theorem 1·2 below).