4 papers
Khovanov monodromy groups via motions
Gabriel Corrigan, Livio Ferretti, Isacco Nonino +1
For any link, we define a monodromy map from the motion group of the link to the group of automorphisms of the link's Khovanov homology. The image of this map is the \emph{unorient…
Extended signatures and link concordance
David Cimasoni, Livio Ferretti, Iuliia Popova
The Levine-Tristram signature admits an n-variable extension for n-component links: it was first defined as an integer valued function on , and recently exte…
A diagrammatic computation of abelian link invariants
David Cimasoni, Livio Ferretti, Jessica Liu
We show how the multivariable signature and Alexander polynomial of a colored link can be computed from a single symmetric matrix naturally defined from a colored link diagram. In…
Two strand twisting
Lambert A'Campo, Sebastian Baader, Livio Ferretti +1
We prove that fibred knots cannot be untied with -moves, for all . More generally, we give an upper bound on the number of two strand twist operations that…