A New Metatheorem and Subdirect Product Theorem for L -Subgroups

This paper is a continuation of the work of Tom Head 'Metatheorem for deriving fuzzy theorems from crisp versions'. The concept of natural extension is introduced which is then applied in the development of a new metatheorem in L-setting, where L is a complete chain. The application of thi...

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Published in:Fuzzy information and engineering 2018-04, Vol.10 (2), p.129-144
Main Authors: Ajmal, Naseem, Jahan, Iffat
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Language:English
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Commutators
Subgroups
Theorems
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description This paper is a continuation of the work of Tom Head 'Metatheorem for deriving fuzzy theorems from crisp versions'. The concept of natural extension is introduced which is then applied in the development of a new metatheorem in L-setting, where L is a complete chain. The application of this theorem is demonstrated through the notions of generated L-subgroups and commutator L-subgroups. Moreover, a new subdirect product theorem is developed wherein it is demonstrated that for a group G, the L-subgroup lattice can be represented as a subdirect product of copies of its associated lattice of crisp subgroups. The significance of this theorem is exhibited by applying it to a characterization of generalized cyclic groups in terms of the distributivity of the lattice of L-subgroups of a group.
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subjects Commutators
Subgroups
Theorems
title A New Metatheorem and Subdirect Product Theorem for L -Subgroups
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