Equivariant K-theory classes of matrix orbit closures

Andrew Berget, Alex Fink

The group $G=G{L}_r(k)\times (k^{\times }{)}^n$ acts on ${\mathbf{A}}^{r\times n}$, the space of $r$-by-$n$ matrices: $G{L}_r(k)$ acts by row operations and $(k^{\times }{)}^n$ scales columns.…