A two-dimensional direction-length framework is a pair (G, p), where G = (V ; D, L) is a graph whose edges are labeled as `direction' or `length' edges, and a map p from...
Let G = (V, E) be a graph. Let c : V → N be a vertex-coloring of the vertices of G. For any vertex u, we denote by N[u] its closed neighborhood (u and its adjacent vertices), an...
An edge-magic total labelling (EMTL) of a graph G with n vertices and e edges is an injection : V (G)E(G) [n+e], where, for every edge uv E(G), we have wt(uv) = k, the magic sum...