%0 Book Section %T Expansible and Reductible Computable Aggregation Rules publisher CAEPIA'15 %D 2015 %U 978-84-608-4099-2 %@ https://hdl.handle.net/20.500.14352/35794 %X The aggregation operator have been considered from a computable point of view. The important condition that the computation is friendly when portions of data are inserted o deleted to the list of values to aggregate is considered. %~