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- W3037879932 abstract "Just as links may be algebraically described as certain morphisms in the category of tangles, compact surfaces smoothly embedded in R^4 may be described as certain 2-morphisms in the 2-category of `2-tangles in 4 dimensions'. In this announcement we give a purely algebraic characterization of the 2-category of unframed unoriented 2-tangles in 4 dimensions as the `free semistrict braided monoidal 2-category with duals on one unframed self-dual object'. A forthcoming paper will contain a proof of this result using the movie moves of Carter, Rieger and Saito. We comment on how one might use this result to construct invariants of 2-tangles." @default.
- W3037879932 created "2020-07-02" @default.
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- W3037879932 date "1997-03-18" @default.
- W3037879932 modified "2023-09-24" @default.
- W3037879932 title "2-Tangles" @default.
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