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Order based on associative operations. (English) Zbl 1539.03096

Summary: Inspired by the classical works on obtaining order from semigroups, recently, many researchers have proposed orders based on associative fuzzy logic connectives. However, the use of these monotone operators succinctly assumes and implies the presence of an (existing) order on the underlying set. In this work, we consider associative operations \(F\) on a non-empty set \(\mathbb{P}\) without recourse to any ordering that may or may not be available on it. Picking the most general of the definitions of order proposed so far, that of F. Karaçal and M. N. Kesicioğlu [Kybernetika 47, No. 2, 300–314 (2011; Zbl 1245.03086)], we determine the necessary and sufficient conditions on an associative operation \(F\) to obtain a poset on \(\mathbb{P}\). Following this we investigate the classes of t-norms, t-conorms, uninorms and nullnorms – which are the typical fuzzy logic operations considered so far to obtain orders – that satisfy these conditions and also do a comparative study of the structures obtained from the different orders proposed so far. Finally, we explore further conditions required on an associative operation \(F\) to obtain richer order-theoretic structures.

MSC:

03B52 Fuzzy logic; logic of vagueness
03E72 Theory of fuzzy sets, etc.
06A06 Partial orders, general

Citations:

Zbl 1245.03086
Full Text: DOI

References:

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