The Lee Spectral Sequence, Unknotting Number, and the Knight Move Conjecture
Abstract
We show that the page at which the Lee spectral sequence collapses gives a bound on the unknotting number, u(K). In particular, for knots with u(K)<3, we show that the Lee spectral sequence must collapse at the E2 page. An immediate corollary is that the Knight Move Conjecture is true when u(K)<3.
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