Arc-disjoint in- and out-branchings in semicomplete split digraphs

Jiangdong Ai, Yiming Hao, Zhaoxiang Li +1

An \emph{out-tree (in-tree)} is an oriented tree where every vertex except one, called the \emph{root}, has in-degree (out-degree) one. An \emph{out-branching $B_u^{+}$ (in-branching…