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Vanishing nontrivial elements in a knot group by Dehn fillings

机译:Dehn填充物消除的结中非平凡元素

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摘要

Let K be a nontrivial knot in S-3 with the exterior E(K), and denote pi(1)(E(K)) by G(K). We prove that for any hyperbolic knot K and any nontrivial element g is an element of G(K), there are only finitely many Dehn fillings of E(K) which trivialize g. We also demonstrate that there are infinitely many nontrivial elements in G(K) which cannot be trivialized by naontrivial Dehn fillings. (C) 2019 Elsevier B.V. All rights reserved.
机译:令K为S-3中具有外部E(K)的非平凡结,并用G(K)表示pi(1)(E(K))。我们证明,对于任何双曲结K和任何非平凡元素g是G(K)的元素,只有有限多个E(K)的Dehn填充使g变得平凡。我们还证明,G(K)中有无限多个非平凡元素,它们不能通过非平凡Dehn填充来平凡化。 (C)2019 Elsevier B.V.保留所有权利。

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