Abstract
There is widespread interest in the gauge groups of principal SU(n)-bundles over simply-connected four-manifolds, and the gauge groups of principal U(n)-bundles over compact, orientable surfaces. We show that in the stable case of SU(∞) (resp. U(∞)), the gauge groups decompose, up to a multiplicative homotopy which holds integrally, as an explicit product where each factor is an iterated loop space of SU(∞) (resp. U(∞)).
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Theriault, S. Homotopy decompositions of stable gauge groups. Arch. Math. 103, 493–498 (2014). https://doi.org/10.1007/s00013-014-0708-3
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DOI: https://doi.org/10.1007/s00013-014-0708-3