The boundary of the irreducible components for invariant subspace varieties

Justyna Kosakowska, Markus Schmidmeier

Given partitions $\alpha$, $\beta$, $\gamma$, the short exact sequences $0\to N_{\alpha }\to N_{\beta }\to N_{\gamma }\to 0$ of nilpotent linear operators of Jordan types $\alpha$, $\beta$, $\gamma$, respectively, define a construc…