Twisting quasi-alternating links
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Quasi-alternating links are homologically thin for both Khovanov homology and knot Floer homology. We show that every quasi-alternating link gives rise to an infinite family of quasi-alternating links obtained by replacing a crossing with an alternating rational tangle. Consequently, we show that many pretzel links are quasi-alternating, and we determine the thickness of Khovanov homology for "most" pretzel links with arbitrarily many strands.
Revised for publication in Proc. Amer. Math. Soc., 8 pages
Revised for publication in Proc. Amer. Math. Soc., 8 pages