2022/11/18 by Theo Beldon, Beldon, Theo, Mia DeStefano +7 · 2 citations
Computer Science · Mathematics · #57K10 #57K18 #FOS: Mathematics #Geometric Topology (math.GT) #Geometric and Algebraic Topology #Homotopy and Cohomology in Algebraic Topology #Logic, programming, and type systems
paper · pdf · doi:10.48550/arxiv.2211.10009
openalex publication_date 2022/11/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The Turaev surface of a link diagram D is a closed, oriented surface constructed from a cobordism between the all-A and all-B Kauffman states of D. The Turaev genus of a link L is the minimum genus of the Turaev surface of any diagram D of L. A link is alternating if and only if its Turaev genus is zero, and so one can view Turaev genus one links as being close to alternating links. In this paper, we study the Khovanov homology of a Turaev genus one link in the first and last two polynomial gradings where the homology is nontrivial. We show that a particular summand in the Khovanov homology of a Turaev genus one link is trivial. This trivial summand leads to a computation of the Rasmussen s invariant and to bounds on the smooth four genus for certain Turaev genus one knots.