residuum

jäännös The residue, remainder or rest of something
puhekieltä The solid material remaining after the liquid in which it was dissolved has been evaporated; a residue.
puhekieltä A binary function from 0,1 × 0,1 to 0,1 which is defined in terms of the t-norm as follows: x \rightarrow y = \sup \{ z | z x \leqslant y\}, where * denotes the t-norm function and \sup denotes the supremum.

The residuum of the minimum t-norm is a function \rightarrow such that x \rightarrow y = \begin{cases} y, & \text{if } x > y \\ 1, & \text{if } x \leqslant y .\end{cases}