Document Type : Research Paper
School of Mathematical Sciences, Xinjiang Normal University, Urumqi, Xinjiang 830054, P. R. China
College of Mathematics and System Sciences, Xinjiang University, Urumqi, Xinjiang 830046, P. R. China
The Gutman index and Schultz index are two topological indices. In this paper, we first give exact formulae for the expected values of the Gutman index and Schultz index of random phenylene chains, and we will also get the average values of the Gutman index and Schultz index in phenylene chains.