0421933 20240103203535.020140107235959.9 5 s. P cav_un_epca*0422507978-84-16046-04-143-48OviedoUniversidad de Oviedo2013De BaetsB.FodorJ.MontesS. internal operator aggregation operator idempotency cav_un_auth*0271524 Bustince H. ES cav_un_auth*0261857 Paternain D. ES cav_un_auth*0298852 De Miguel L. ES cav_un_auth*0101163 Mesiar Radko Ekonometrie Department of Econometrics E E UTIA-B Department of Econometrics G Ústav teorie informace a automatizace AV ČR, v. v. i. http://library.utia.cas.cz/separaty/2013/E/mesiar-0421933.pdf GAP402/11/0378 GA ČR cav_un_auth*0273630 In this paper we consider internal operators as a method giving as an output from input arguments one of the input arguments. We discuss some properties of such operators. cav_un_auth*0298224 EUROFUSE 2013 Oviedo 02.12.2013-04.12.2013 ES 2014 BA 4 PR RVO:67985556 http://hdl.handle.net/11104/0228648 2013 cav_un_epca*0422507 EUROFUSE 2013 Workshop on Uncertainty and Imprecision Modelling in Decision Making 978-84-16046-04-1 43 48 Oviedo Universidad de Oviedo 2013 De Baets B. 340 Fodor J. 340 Montes S. 340