JOURNAL OF ALGEBRA AND ITS APPLICATIONS, cilt.23, ss.1-12, 2024 (SCI-Expanded)
In this paper, we study the class of Zp-double cyclic codes of length
n = r + s. We give a closed formula for the number of Zp-double cyclic
codes of length n = r+s, for any integers r and s that are relatively prime
to p. Moreover, we give a closed formula for the number of quasi-cyclic
(QC) codes of length n = 2s and index 2. We also provide formulas for the
number of separable and non-separable Zp-double cyclic codes of length n.
In order to illustrate the results, we calculate the number of some codes
with different r and s. Moreover, we list optimal parameter Z2-double
cyclic codes for specific values of r and s.