Department of Mathematics,
Government Arts College, Tiruvannamalai-606603, Tamilnadu, INDIA.

ABSTRACT

A sum divisor cordial labeling of a graph G with vertex set V is a bijection
f from V to {1,2,...,|V(G) |} such that each edge uv assigned the label 1 if 2
divides f (u) f (v) and 0 otherwise. Further, the number of edges labeled with
0 and the number of edges labeled with 1 differ by at most 1. A graph with a sum
divisor cordial labeling is called a sum divisor cordial graph. In this paper, we prove
that n H ( n is odd), 3 1, @ n C K , < 1 2
n n F F >, open star of Swastik graphs
( . ) n S t Sw when t is odd, are sum divisor cordial graphs.
AMS Mathematics Subject Classification (2010): 05C78.

Keywords :Divisor cordial labeling, sum divisor cordial labeling.