## Algebraic invariants arising from the chromatic polynomials of theta graphs

- Daniel Delbourgo, Kerri Morgan
- Australasian J. Combinatorics
- 2014

The multivariate Tutte polynomial ẐM of a matroid M is a generalization of the standard two-variable version, obtained by assigning a separate variable ve to each element e of the ground set E. It encodes the full structure of M . Let v = {ve}e∈E , let K be an arbitrary field, and suppose M is connected. We show that ẐM is irreducible over K(v), and give… (More)