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Group actions and group extensions

Author(s): Ergün Yalçin
Journal: Trans. Amer. Math. Soc. 352 (2000), 2689-2700.
MSC (1991): Primary 57S25; Secondary 20J06, 20C15
Posted: February 24, 2000
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Abstract: In this paper we study finite group extensions represented by special cohomology classes. As an application, we obtain some restrictions on finite groups which can act freely on a product of spheres or on a product of real projective spaces. In particular, we prove that if $(Z/p)^r$ acts freely on $(S^1)^k$, then $r \leq k$.

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Additional Information:

Ergün Yalçin
Affiliation: Department of Mathematics, University of Wisconsin, Madison, Wisconsin 53706
Address at time of publication: Department of Mathematics, Indiana University, Bloomington, Indiana 47405
Email: eyalcin@math.indiana.edu

DOI: 10.1090/S0002-9947-00-02485-5
PII: S 0002-9947(00)02485-5
Keywords: Group extensions, special classes, products of spheres, cohomology of groups
Received by editor(s): January 30, 1998
Posted: February 24, 2000
Additional Notes: Partially supported by NATO grants of the Scientific and Technical Research Council of Turkey
Copyright of article: Copyright 2000, American Mathematical Society

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