Bridge-index conjecture for discrete Morse vectors of knots

Let KK be a knot with bridge index bb. Say that a dd-complex has discrete Morse vector (c0,,cd)(c_0,\ldots,c_d) if it admits a discrete Morse function with exactly cic_i critical faces of dimension ii. Bridge-index conjecture. The knot KK appears in both of the following ways:

  1. As a knotted spanning edge in some 33-ball with discrete Morse vector (1,b2,b2,0)(1,b-2,b-2,0), if b2b\geq 2.
  2. As a 33-edge subcomplex of some 33-sphere with discrete Morse vector (1,b3,b3,1)(1,b-3,b-3,1), if b3b\geq 3.

The claim is presented as a conjectural consequence suggested by the knot-theoretical approach, relating bridge index to the minimum number of critical faces in a discrete Morse function. Its resolution is not specified in the supplied text.

Sources & referencesView supporting material

Primary source

Karim Adiprasito and Bruno Benedetti, “Tight complexes in 3-space admit perfect discrete Morse functions”, arXiv:1202.3390 (2012).

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