ON RANDIC SPECTRUM OF THE ZERO-DIVISOR GRAPH OVER THE RING Zn

Let R be a commutative ring and Z(R) be its zero-divisors set. The zero -divisor graph of R, denoted by G(R), is an undirected graph with vertex set Z(R)* = Z(R) \ {0} and two distinct vertices a and b are adjacent if and only if ab = 0. In this article, for n = p(M1) q(M2) where p and q are primes (p < q) and M1 and M2 are positive integers, we calculate the Randic eigenvalues of the graphs G(Z(n)).