Arc-connectivity and super arc-connectivity of mixed Cayley digraph
  A digraph X=(V, E) is max-\lambda, if \lambda(X)=\delta(X). A digraph X is super-\lambda if every minimum cut of X is either the set of inarcs of some vertex or the set of outarcs of some vertex. In this paper, we will prove that for all but a few exceptions, the strongly connected mixed Cayley digraphs are max-\lambda and super-\lambda. 
Yuhu Liu, Jixiang Meng
math.CO