The unitary Cayley graph of upper triangular matrix rings

Waldemar Hołubowski, Sergiy Kozerenko, Bogdana Oliynyk +1

The unitary Cayley graph $C_R$ of a finite unital ring $R$ is the simple graph with vertex set $R$ in which two elements $x$ and $y$ are connected by an edge if and only if $x-y$ i…