Webnating knot is both almost-alternating and toroidally alternating. Proposition 1. Let K be an alternating knot. Then K has an almost-alternating diagram and a toroidally alternating diagram. Proof. By [4], every alternating knot has an almost-alternating diagram. By [3], we can nd a toroidally alternating diagram from an almost-alternating diagram. Web13 de fev. de 2015 · The degree of the Alexander polynomial gives a bound on the genus, so we get 2 g ( T p, q) ≥ deg Δ T p, q = ( p − 1) ( q − 1). Since this lower bound agrees with the upper bound given by Seifert's algorithm, you're done. Here's another route: the standard picture of the torus knot is a positive braid, so applying Seifert's algorithm ...
On a Move Reducing the Genus of a Knot Diagram - JSTOR
Web30 de set. de 1995 · A princess whose uncle leaves her deep in a cave to die at the hands of a stagman. But when she meets the stagman at last, Ruendiscovers fatehas a few … Webtheory is the knot Floer homology HFK\(L) of Ozsvath-Szab´o and Rasmussen [7], [15]. In its simplest form, HFK\(L) is a bigraded vector space whose Euler characteristic is the Alexander polynomial. Knot Floer homology is known to detect the genus of a knot [10], as well as whether a knot is fibered [14]. There exists a refinement of HFK ... ipcs 2022
Knotted Roots on the Lake - Venue - Land O Lakes, FL
WebThe first-order genus of a knot is difficult to compute, as there are many symplectic bases for a given Seifert surface. While difficult to compute in general, the first-order genus is a notion of higher-order genusdefinedforallknots. In this paper, we define a similar invariant, though it is only defined for alge- Web6 de nov. de 2024 · Journal of Knot Theory and Its Ramifications. Given a knot in the 3-sphere, the non-orientable 4-genus or 4-dimensional crosscap number of a knot is the minimal first Betti number of non-orientable surfaces, smoothly and properly embedded in the 4-ball, with boundary the knot. In this paper, we calculate the non-orientable 4 … WebIt is known that knot Floer homology detects the genus and Alexander polynomial of a knot. We investigate whether knot Floer homology of detects more structure of minimal genus Seifert surfaces for K. We de fine an invariant of algebraically slice, genus one knots and provide examples to show that knot Floer homology does not detect this invariant. ipc-s22fp-0360b-imou