In this note we prove that the unique concave t-norm is Minimum and, among the class of triangular functions that have the family of unit step-functions as idempotent elements, the unique concave triangular function is piM.
@article{urn:eudml:doc:38909,
title = {Sobre la concavidad de t-normas y de funciones triangulares.},
journal = {Stochastica},
volume = {8},
year = {1984},
pages = {91-95},
zbl = {0567.26010},
mrnumber = {MR0780142},
language = {es},
url = {http://dml.mathdoc.fr/item/urn:eudml:doc:38909}
}
Agell, Núria. Sobre la concavidad de t-normas y de funciones triangulares.. Stochastica, Tome 8 (1984) pp. 91-95. http://gdmltest.u-ga.fr/item/urn:eudml:doc:38909/