In this paper the sufficient conditions for the existence of positive solutions of the neutral difference equations with positive and negative coefficients are
Let G be a k-connected simple graph with order n. The k-diameter, combining connectivity with diameter, of G is the minimum integer dk(G) for which between any
The singularly perturbed initial boundary value problems for reaction diffusion equations are considered. Under suitable conditions and by using the theory of d
Based on the combination of fractional calculus with fractal functions, a new type of is introduced; the definition, graph, property and dimension of this functi
The cutwidth problem for a graph G is to embed G into a path such that the maximum number of overlap edges is minimized. This paper presents an approach based o
Abstract. A matrix whose entries are +, -, and 0 is called a sign pattern matrix. For a signpattern matrix A,if A3 =A, then A is said to be sign tripotent. In t
The existence and uniqueness results about quasilinear periodic boundary value problems are established by using the global inverse function theorem and the res