Let Zn be the ring of residue classes modulo n. Define f : Zn 7→ Zn by f (x) = x4. Action of this map is studied by means of digraphs which produce an edge from the residue classes a to b if f (a) ≡ b. For every integer n, an explicit formula is given for the number of fixed points of f . It is shown that the graph G(pk), k ≥ 1 has four fixed points if and only if 3 | p−1 and has two fixed points if and only if 3 ∤ p−1. A classification of cyclic vertices of the graph G(pk) has been determined. A complete enumeration of non-isomorphic cycles and components of G(pk) has been explored.
Digital Object Identifier (DOI)
Khalid Mahmood, M. and Ahmad, Farooq
"A Classification of Cyclic Nodes and Enumeration of Components of a Class of Discrete Graphs,"
Applied Mathematics & Information Sciences: Vol. 09:
1, Article 22.
Available at: https://digitalcommons.aaru.edu.jo/amis/vol09/iss1/22