Abstract
Let R be a commutative ring and Z(R) be the set of all zero divisors of R. Gamma(R) is said to be a zero divisor graph if x, y E V (Gamma(R)) = Z(R) and (x, y) E E(Gamma(R)) if and only if x.y = 0. In this paper, we determine the total vertex irregularity strength of zero divisor graphs associated with the commutative rings Zp2 X Zq for p, q prime numbers.