The stable maximum nullity of digraphs and $1$-DAGs

Marina Arav, Hein van der Holst

Given a digraph $D=(V,A)$ with vertex-set $V=\{1,\dots ,n\}$ and arc-set $A$, we denote by $Q(D)$ the set of all real $n\times n$ matrices $B=[b_{u,w}]$ with $b_{u,u}\ne 0$ for al…