Title Some results about m(G) =|G'|+|Z(G)/|G| Type Presentation Keywords Commutator subgroup, Center of a group. Abstract Let G be a finite group and m(G) = =|G'|+|Z(G)/|G . We study the set R m(G) : G is a finite group}. We show that if 1/2m1/2 Researchers hamidreza dorbidi (First researcher)