Impact Factor (2025): 6.9
DOI Prefix: 10.47001/IRJIET
In an
edge-magic total labeling, the integers 1, 2,..., p+q are assigned in a
bijective manner to the vertices and edges of a graph G(p, q) in such a way
that the edge-sum f(u) + f(uv) + f(v) remains constant at k for each and every
edge uv. For every edge-magic labeling f, its corresponding labeling f̄, which
can be expressed as f̄(x) = p + q + 1 − f(x), is also edge-magic. This results
in a detectable change in the magic constant. In this study, cycle graphs C_n
are investigated, and it is shown that every cycle has an edge-magic labeling
and that the complement of that labeling is likewise edge-magic. As a result,
every cycle possesses a complementary edge-magic property. For the residue
classes n ≡ 0 (mod 4) and n ≡ 2 (mod 4), we present explicit constructs for odd
and even cycles. These constructs enhance the conventional cycle constructions
while stressing a separate extra meaning. The constructions are demonstrated
through the use of illustrative instances and a labeled figure, which also
serves to validate the ensuing constant edge sums for both the original and
complementary labeling structures.
Country : Sultanate of Oman
IRJIET, Volume 9, Issue 12, December 2025 pp. 163-166