Daniil Fomichev

collaborators

2 papers

math.CO2026

$sl (2)$ -weight system does not extend to a graph 4-invariant

Daniil Fomichev, Maksim Karev, Fedor Pavutnitskiy +1

A long-standing question by S. Lando asks whether the $sl (2)$ -weight system extends to a unique 4-invariant of graphs. We show that, in full generality, the answer to th…

math.CO2025

The sl(2)-weight system at c = 3/8 for graphs

Daniil Fomichev, Maksim Karev

We construct a 4-invariant that extends a specialization of the $sl (2)$ -weight system at $c = \frac{3}{8}$ , and satisfies a simple deletion-contraction relation.

sl(2)-weight system does not extend to a graph 4-invariant

The sl(2)-weight system at c = 3/8 for graphs

$sl (2)$ -weight system does not extend to a graph 4-invariant