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Some Hermitian K-groups via geometric topology
Published 12 Feb 2020 in math.AT and math.KT | (2002.05255v2)
Abstract: We compute the first two symplectic quadratic K-theory groups of the integers, or equivalently, the first two stable homology groups of the group of symplectic integral matrices preserving the standard quadratic refinement. The main novelty in our calculation lies in its method, which is based on high-dimensional manifold theory.
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