Motivated by a question of SÃ¡rkÃ¶zy, we investigate sufficient conditions for existence of sets of natural numbers A and B such that the number of solutions of the equation a + b = n where a âˆˆ A and bâ€¦ (More)

An assignment of real weights to the edges and the vertices of a graph is a vertexcoloring total weighting if the total weight sums at the vertices are distinct for any two adjacent vertices. Ofâ€¦ (More)