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Transactions of the American Mathematical Society
Transactions of the American Mathematical Society
ISSN 1088-6850(online) ISSN 0002-9947(print)

 

Connected finite loop spaces with maximal tori


Authors: J. M. Møller and D. Notbohm
Journal: Trans. Amer. Math. Soc. 350 (1998), 3483-3504
MSC (1991): Primary 55P35, 55R35
MathSciNet review: 1487627
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Abstract: Finite loop spaces are a generalization of compact Lie groups. However, they do not enjoy all of the nice properties of compact Lie groups. For example, having a maximal torus is a quite distinguished property. Actually, an old conjecture, due to Wilkerson, says that every connected finite loop space with a maximal torus is equivalent to a compact connected Lie group. We give some more evidence for this conjecture by showing that the associated action of the Weyl group on the maximal torus always represents the Weyl group as a crystallographic group. We also develop the notion of normalizers of maximal tori for connected finite loop spaces, and prove for a large class of connected finite loop spaces that a connected finite loop space with maximal torus is equivalent to a compact connected Lie group if it has the right normalizer of the maximal torus. Actually, in the cases under consideration the information about the Weyl group is sufficient to give the answer. All this is done by first studying the analogous local problems.


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Additional Information

J. M. Møller
Affiliation: Matematisk Institut, Universitetsparken 5, DK–2100 København Ø, Denmark
Email: moller@math.ku.dk

D. Notbohm
Affiliation: Mathematisches Institut, Bunsenstr. 3-5, 37073 Göttingen, Germany
Email: notbohm@cfgauss.uni-math.gwdg.de

DOI: http://dx.doi.org/10.1090/S0002-9947-98-02247-8
PII: S 0002-9947(98)02247-8
Keywords: Finite loop space, $p$--compact group, classifying space, maximal torus, normalizer, Weyl group, covering
Received by editor(s): July 11, 1995
Article copyright: © Copyright 1998 American Mathematical Society