Homology, Homotopy and Applications

Volume 15 (2013)

Number 2

Power maps on $p$-regular Lie groups

Pages: 83 – 102

DOI: http://dx.doi.org/10.4310/HHA.2013.v15.n2.a5


Stephen Theriault (School of Mathematics, University of Southampton, United Kingdom)


A simple, simply-connected, compact Lie group $G$ is $p$-regular if it is homotopy equivalent to a product of spheres when localized at $p$. If $A$ is the corresponding wedge of spheres, then it is well known that there is a p-local retraction of $G$ off $ΩΣA$. We show that that complementary factor is very well behaved, and this allows us to deduce properties of $G$ from those of $ΩΣA$. We apply this to show that, localized at $p$, the $p^{th}$-power map on $G$ is an $H$-map. This is a significant step forward in Arkowitz-Curjel and McGibbon’s programme for identifying which power maps between finite $H$-spaces are $H$-maps.


Lie group, $p$-regular, power map

2010 Mathematics Subject Classification

55Txx, 55P35

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Published 4 December 2014