Abstract
Abstract Commutative K-theory, a cohomology theory built from spaces of commuting matrices, has been explored in recent work of Adem, Gómez, Gritschacher, Lind and Tillman. In this article, we use unstable methods to construct explicit representatives for the real commutative K-theory classes on surfaces. These classes arise from commutative O ( 2 ) {O(2)} -valued cocycles and are analyzed via the point-wise inversion operation on commutative cocycles.
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