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arXiv · 1210.8252

Homotopy pullback of $A_n$-spaces and its applications to $A_n$-types of gauge groups

Mitsunobu Tsutaya
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Abstract

We construct the homotopy pullback of $A_n$-spaces and show some universal property of it. As the first application, we review the Zabrodsky's result which states that for each prime $p$, there is a finite CW complex which admits an $A_{p-1}$-form but no $A_p$-form. As the second application, we investigate $A_n$-types of gauge groups. In particular, we give a new result on $A_n$-types of the gauge groups of principal $\mathrm{SU}(2)$-bundles over $S^4$, which is a complete classification when they are localized away from 2.

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BibTeXRIS

Mitsunobu Tsutaya. 2012-10-31. Homotopy pullback of $A_n$-spaces and its applications to $A_n$-types of gauge groups. https://arxiv.org/abs/1210.8252

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