Small $q$-kernels in digraphs with minimum in-degree $\hat{I}´$

Geoffrey Boyer, Matt Burnham, Daniela Černá +5

For a digraph $D$, a subset $Q\subseteq V(D)$ is called a $q$-kernel if $Q$ is an independent set and all vertices in $V(D)$ are reachable from $Q$ via a directed path of length at…