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A discussion on aggregation operators. (English) Zbl 1249.68229
Summary: Lately, it has become clear that aggregation processes cannot be based upon a unique binary operator. Global aggregation operators have been therefore introduced as families of aggregation operators $$\{T_n\}_n$$, where the $$n$$-ary operator$$T_n$$ amalgamates information whenever the number of items to be aggregated is $$n$$. Of course, some mathematical restrictions can be introduced in order to assure an appropriate meaning, consistency and key mathematical capabilities.
In this paper, we discuss these standard conditions, pointing out their respective relevance.

##### MSC:
 68T30 Knowledge representation 03E72 Theory of fuzzy sets, etc.
##### Keywords:
aggregation rule; logical connective; fuzzy set
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