“…An irregularity measure (IM) of a connected graph G is a non-negative graph invariant satisfying the property: IM(G) = 0 if and only if G is regular. There exist several degreebased and eigenvalue-based graph irregularity measures [5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23]. The following irregularity measure, defined for a connected (n, m)-graph G, is called Collatz-Sinogowitz irregularity index [6]:…”