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On a class of operators for expert systems. (English) Zbl 0785.68087
This paper mainly deals with a class of connectives that modelize the propagation of uncertainty in expert systems when a finite set of linguistic terms (or “labels”) is considered.
Continuous De Morgan triplets are frequently used to model this propagation in the fuzzy sets approach. We introduce a new definition (“directed algebra”) in order to obtain similar properties to those of continuous De Morgan triplets, but now on a totally ordered finite set. It is proved that there exist $$2^ n$$ different directed algebra structures on a totally ordered set of $$n+2$$ elements. All these structures are described and it is proved that only one of them is Archimedean.
Reviewer: G.Mayor

##### MSC:
 68T30 Knowledge representation 68T35 Theory of languages and software systems (knowledge-based systems, expert systems, etc.) for artificial intelligence
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##### References:
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