Autor:	Franz, Matthias, Puppe, Volker
Rok vydání:	2007
Předmět:	Mathematics - Algebraic Topology Mathematics - Geometric Topology 55N91 (Primary) 55M35 57S25 (Secondary)
Zdroj:	pp. 87-98 in: M. Harada et al. (eds.), Toric Topology (Osaka, 2006), Contemp. Math. 460, 2008
Druh dokumentu:	Working Paper
DOI:	10.1090/conm/460/09012
Popis:	We survey generalisations of the Chang-Skjelbred Lemma for integral coefficients. Moreover, we construct examples of manifolds with actions of tori of rank > 2 whose equivariant cohomology is torsion-free, but not free. This answers a question of Allday's. The "mutants" we construct are obtained from compactified representations and involve Hopf bundles in a crucial way. Comment: 11 pages; more details on the smooth structure of the mutants; other, minor changes
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0710.2302 Zobrazit plný text záznamu View this record from Arxiv