Reduction of bridge positions along bridge disks

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Abstract

We consider a reduction of a knot in a bridge position along two disjoint bridge disks D1 and D2. Suppose that a reduction of the knot along any subset of {D1,D2} results in a bridge position, where we get two distinct new bridges after the reduction along D1∪D2. We show that there are two disjoint bridge disks E1 and E2 such that (D1,E1) and (D2,E2) are cancelling pairs and (D1∪E1)∩(D2∪E2)=∅.

Original languageEnglish
Pages (from-to)50-59
Number of pages10
JournalTopology and its Applications
Volume223
DOIs
StatePublished - 2017.06.1

Keywords

  • Bridge disk
  • Bridge splitting
  • Cancelling pair

Quacquarelli Symonds(QS) Subject Topics

  • Mathematics

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