It is shown, in a general frame and playing with idempotency, that in order to have on a given lattice a Multiple Valued Logic preserving the lattice structure, the only t-norms and t-conorms allowing to modelize the truth values of a v b, a ^ b and a --> b are Min and Max, respectively, apart from ordinal sums.
@article{urn:eudml:doc:39001, title = {On functions that cannot be mv-truth values in algebraic structures.}, journal = {Stochastica}, volume = {12}, year = {1988}, pages = {223-227}, zbl = {0693.03043}, mrnumber = {MR1024760}, language = {en}, url = {http://dml.mathdoc.fr/item/urn:eudml:doc:39001} }
Trillas, Enric. On functions that cannot be mv-truth values in algebraic structures.. Stochastica, Tome 12 (1988) pp. 223-227. http://gdmltest.u-ga.fr/item/urn:eudml:doc:39001/