application of outflow water from treatment plants for irrigation as a non-usual water resource is being developed due to the lack of usual water resources in iran. activated carbon as a conditioner in water treatment procedures causes undesired changes in hydraulic properties of porous media and soil degradation. in this paper, the effects of activated carbon concentration on hydrodynamic prop...

this article is an application of mathematics in finance, whose approach is different from the usual methods of writing articles in humanities. in other words, this research article can be considered as a fundamental study based on mathematics for clearer and safer disclosure of information in capital markets. in this paper, we will challenge the informational inefficiencies existing in total r...

For a graph G=(V,E), its exact-distance square, G[♯2], is the with vertex set V and an edge between vertices x y if only have distance (exactly) 2 in G. The G square root of G[♯2]. We give characterization graphs having root, our easily leading to polynomial-time recognition algorithm. show that it NP-complete recognize bipartite root. These two results strongly contrast known on (usual) square...