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math.GT2026
Equivariant Grid Homology for Strongly Invertible Knots
Giovanni Framba
We study an equivariant version of grid homology for strongly invertible knots. We consider symmetric grid diagrams encoding the strong inversion, prove that every strongly inverti…
math.GT2023
Solvability of concordance groups and Milnor invariants
Alessio Di Prisa, Giovanni Framba
Using Milnor invariants, we prove that the concordance group of -string links is not solvable. As a consequence we prove that the equivariant concordance group…
math.GT2023
A new invariant of equivariant concordance and results on 2-bridge knots
Alessio Di Prisa, Giovanni Framba
We study the equivariant concordance classes of two-bridge knots, providing an easy formula to compute their butterfly polynomial, and we give two different proofs that no two-brid…