A closed formula for the evaluation of $\mathfrak{sl}_N$-foams

Abstract

We give a purely combinatorial formula for evaluating closed decorated foams. Our evaluation gives an integral polynomial and is directly connected to an integral equivariant version of the $\mathfrak{sl}_N$ link homology categorifying the $\mathfrak{sl}_N$ link polynomial. We also provide connections to the equivariant cohomology rings of partial flag manifolds.

Many figures, 2 tables, Comments welcome ! Typos fixed. The computation tables were missing in v2, they are back in v3