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Deformation retraction of the group of strict contactomorphisms of the three-sphere to the unitary group

Published 20 Aug 2021 in math.DG, math.AT, math.GT, and math.SG | (2108.08961v2)

Abstract: We prove that the group of strict contactomorphisms of the standard tight contact structure on the three-sphere deformation retracts to its unitary subgroup U(2).

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