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首页> 外文期刊>Journal of knot theory and its ramifications >UNKNOTTING OF PSEUDO-RIBBON n-KNOTS
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UNKNOTTING OF PSEUDO-RIBBON n-KNOTS

机译:匿名伪丝带n结

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摘要

Let K be a classical knot in R~3. We can deform the diagram of K to that of a trivial knot by changing the overcrossings and undercrossings at some double points of the diagram of K. We consider the same problem for higher dimensional knots. Let n ≥ 2 and π: R~(n+2) = R~(n+1) * R → R~(n+1) denote the natural projection map. A pseudo-ribbon n-knot is an n-knot f: S~n → R~(n+2) such that the self-intersection set of π o f: S~n → R~(n+1) consists of only double points and is homeomorphic to a disjoint union of (n-1)-spheres. We prove that for n ≠3, 4, the projection (π o f)(S~n) is condation in R~(n+1) of any pseudo-ribbon n-knot f is the projection of a trivial n-knot.
机译:让K是R〜3的古典结。 我们可以通过在K的一些双点改变超交叉和欠孔来将K的图表变形到微缩结中。我们考虑更高尺寸结相同的问题。 让n≥2和π:r〜(n + 2)= r〜(n + 1)* r→r〜(n + 1)表示自然投影映射。 伪带状N结是N结F:S〜N→R〜(n + 2),使得π的自交叉组合集:S〜N→R〜(n + 1)仅包括 双点并对(N-1) - 任命的联盟同源友好。 我们证明,对于N≠3,4,投影(π0f)(s〜n)是任何伪带状n结的R〜(n + 1)中的传感器是普通n结的突出线。

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