no code implementations • 4 Jan 2021 • Min Hoon Kim, Changhee Lee, Minkyoung Song
Greene-Jabuka and Lecuona confirmed the slice-ribbon conjecture for 3-stranded pretzel knots except for an infinite family $P(a,-a-2,-\frac{(a+1)^2}{2})$ where $a$ is an odd integer greater than $1$.
Geometric Topology 57K10, 57K31, 57K40, 57N70
no code implementations • 24 Dec 2020 • Minkyoung Song
We consider extensions of Johnson homomorphisms of a mapping class group, Milnor invariants and Orr invariants of links to homology cylinders, all of which are related to free nilpotent groups.
Geometric Topology 57K31 (Primary), 57N70, 57K35 (Secondary)
