New York Journal of Mathematics
Volume 23 (2017) 1611-1639

  

Adam M. Lowrance and Dean Spyropoulos

The Jones polynomial of an almost alternating link

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Published: November 6, 2017
Keywords: Jones polynomial, almost alternating, knot, link
Subject: 57M25, 57M27

Abstract
A link is almost alternating if it is nonalternating and has a diagram that can be transformed into an alternating diagram via one crossing change. We give formulas for the first two and last two potential coefficients of the Jones polynomial of an almost alternating link. Using these formulas, we show that the Jones polynomial of an almost alternating link is nontrivial. We also show that either the first two or last two coefficients of the Jones polynomial of an almost alternating link alternate in sign. Finally, we describe conditions that ensure an almost alternating diagram has the fewest number of crossings among all almost alternating diagrams of the link.

Author information

Adam M. Lowrance:
Department of Mathematics and Statistics, Vassar College, Poughkeepsie, NY
adlowrance@vassar.edu

Dean Spyropoulos:
Department of Mathematics and Statistics, Vassar College, Poughkeepsie, NY
despyropoulos@vassar.edu