The chain structure of intuitionistic level subgroups in cyclic groups of order \(pq\)

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DOI:

https://doi.org/10.26637/MJM0804/0081

Abstract

It is well known that the set of all level subgroups of any fuzzy subgroup of a finite group forms a chain. In this paper we prove that this result does not extend to Intuitionistic Fuzzy Subgroups (IFSGs) by providing a counter-example. For any two distinct prime numbers \(p\) and \(q\), we prove that the cyclic group \(\mathbb{Z}_{p q}\) has 36 non-isomorphic IFSGs. The Intuitionistic Level Subgroups (ILSGs) of only 28 of them form chains, while those of remaining 8 do not form chains. The list of all the 36 distinct IFSGs is also provided; and those whose ILSGs form a chain, and not, are identified. The case is illustrated using a specific example. We have also obtained a characterisation of IFSGs of \(\mathbb{Z}_{p q}\), whose ILSGs form a chain.

Keywords:

Intuitionistic fuzzy set, intuitionistic fuzzy subgroup, level subgroup, isomorphism, cyclic group

Mathematics Subject Classification:

Mathematics
  • S. Divya Mary Daise Department of Mathematics, St. Albert’s College, Ernakulam (Affiliated to Mahatma Gandhi University), Cochin-682018, India.
  • S. Deepthi Mary Tresa Department of Mathematics, St. Albert’s College, Ernakulam (Affiliated to Mahatma Gandhi University), Cochin-682018, India.
  • Shery Fernandez Department of Mathematics, Cochin University of Science and Technology, Cochin-682022, India.
  • Pages: 1818-1823
  • Date Published: 01-01-2020
  • Vol. 8 No. 04 (2020): Malaya Journal of Matematik (MJM)

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Published

01-01-2020

How to Cite

S. Divya Mary Daise, S. Deepthi Mary Tresa, and Shery Fernandez. “The Chain Structure of Intuitionistic Level Subgroups in Cyclic Groups of Order \(pq\)”. Malaya Journal of Matematik, vol. 8, no. 04, Jan. 2020, pp. 1818-23, doi:10.26637/MJM0804/0081.