Abstract The purpose of this article is to present a new concept soft convergence in topological spaces, namely, Np – nets by using the notion open sets. Also, we study several properties limit points and cluster point nets.

background: canine distemper (cd) is a lethal systemicdisease affecting a wide variety of terrestrial carnivores.objectives: this study was performed to survey epidemiologicaland molecular characteristics of the canine distemper virus(cdv) strains circulating in iran. methods: in this study, 19cdv-suspected unvaccinated dogs from northeast and center ofiran were analyzed for presence of cdv nuc...