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An invariant of tangle cobordisms |
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| Authors: | Mikhail Khovanov |
| Institution: | Department of Mathematics, University of California, One Shields Ave., Davis, California 95616 |
| Abstract: | We construct a new invariant of tangle cobordisms. The invariant of a tangle is a complex of bimodules over certain rings, well-defined up to chain homotopy equivalence. The invariant of a tangle cobordism is a homomorphism between complexes of bimodules assigned to boundaries of the cobordism. |
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