October 2021 Khovanov Homology for Links in #r(S2×S1)
Michael Willis
Michigan Math. J. 70(4): 675-748 (October 2021). DOI: 10.1307/mmj/1594281620
Abstract

We revisit Rozansky’s construction of Khovanov homology for links in S2×S1, extending it to define the Khovanov homology Kh(L) for links L in Mr=#r(S2×S1) for any r. The graded Euler characteristic of Kh(L) can be used to recover WRT invariants at certain roots of unity and also recovers the evaluation of L in the skein module S(Mr) of Hoste and Przytycki when L is null-homologous in Mr. The construction also allows for a clear path toward defining a Lee’s homology Kh(L) and associated s-invariant for such L, which we will explore in an upcoming paper. We also give an equivalent construction for the Khovanov homology of the knotification of a link in S3 and show directly that this is invariant under handle-slides, in the hope of lifting this version to give a stable homotopy type for such knotifications in a future paper.

Copyright © 2021 The University of Michigan
Michael Willis "Khovanov Homology for Links in #r(S2×S1)," Michigan Mathematical Journal 70(4), 675-748, (October 2021). https://doi.org/10.1307/mmj/1594281620
Received: 9 April 2019; Published: October 2021
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Vol.70 • No. 4 • October 2021
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