most citedThe vanishing of the contact invariant in the presence of torsion

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math.GT2007★ 41 cited

The vanishing of the contact invariant in the presence of torsion

Paolo Ghiggini, Ko Honda, Jeremy Van Horn-Morris

We prove that the Ozsvath-Szabo contact invariant of a closed contact 3-manifold with positive Giroux torsion vanishes.