Keywords. Hopf algebras, Bockstein spectral sequence
AMS subject classification. Primary: 16W30. Secondary: 57T05, 55T99.
Submitted: 10 December 2004. (Revised: 24 January 2005.) Accepted: 27 January 2005. Published: 7 February 2005.
Institut de Geometrie, Algebre, et Topologie
Ecole Polytechnique Federale de Lausanne
1015 Lausanne, Switzerland
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