Bianchi Type-IX String Cosmological Models for Perfect Fluid Distribution in General Relativity

The present study deals with Bianchi type-IX string cosmological models for perfect fluid distribution. We consider two cases: (i) ? + ? = 0, (ii) ? ? ? = 0, where ? and ? are the rest energy density and the tension density of a string cloud, respectively. The physical and geometrical properties of the models are discussed.