We calculate the cordial edge deficiencies of the complete multipartite graphs and find an upper bound for their cordial vertex deficiencies. We also give conditions under which the tensor product of two cordial graphs is cordial.

A Sum divisor cordial labeling of a graph G with vertex set V is bijection r from to {1,2,3,...,|V (G )|} such that an edge uv assigned the label 1 if 2 divides r(u)+ (v ) and 0 otherwise; number edges labeled 1differ by at most . sum called graph. In this research paper, we investigate bahevior for Grötzsch graph, fusion any two vertices in duplication arbitrary switching degree four three pat...

We extend the de nition of edge-cordial graphs due to Ng and Lee for graphs on 4k, 4k+1, and 4k+3 vertices to include graphs on 4k+2 vertices, and show that, in fact, all graphs without isolated vertices are edge-cordial. Ng and Lee conjectured that all trees on 4k, 4k + 1, or 4k + 3 vertices are edge-cordial. Intuitively speaking, a graph G is said to be edge-cordial if its edges can be labell...