The natural properties of the aggregation operators and the most elementary
ones are the idempotence, the monotonicity and the continuity from below.
We assume only these properties for the aggregation operators with infinite
ly many inputs, defined by functionals on the family of measurabe functions
. A family of fuzzy measures is associated with each aggregation operator.
The properties of horizontal or vertical pseudo-additivity ate recognizable
by means of this family of fuzzy measures.