Fuzzy permutation graph and its complements

Article type: Research Article

Authors: Raut, Sreenanda^{; *} | Pal, Madhumangal | Ghorai, Ganesh

Affiliations: Department of Applied Mathematics with Oceanology and Computer Programming, Vidyasagar University, Midnapore, India

Correspondence: [*] Corresponding author. Sreenanda Raut, Department of Applied Mathematics with Oceanology and Computer Programming, Vidyasagar University, Midnapore, India. E-mail: rsmo_sraut.math@mail.vidyasagar.ac.in.

Abstract: This paper deals with fuzzy permutation graph which is introduced as a fuzzified model of a crisp permutation graph. We have defined two types of complements of a fuzzy permutation graph viz. p-complement and f-complement. We have considered various examples to encounter the existence and non-existence of the f-complement graph as a fuzzy permutation graph and established a sufficient condition for the existence of the same. Also, we have calculated the possible number of fuzzy permutation graphs that can represent the f-complement of a fuzzy permutation graph for a given permutation depending on the edge-membership values of the fuzzy permutation graph. We have also introduced and characterized fuzzy comparability graph. Lastly, we have discussed a real-life application of fuzzy permutation graph.

Keywords: Fuzzy permutation graph, complement of permutation graph, fuzzy comparability graph

DOI: 10.3233/JIFS-172204

Journal: Journal of Intelligent & Fuzzy Systems, vol. 35, no. 2, pp. 2199-2213, 2018