Residuum meaning : The residue, remainder or rest of something The solid material remaining after the liquid in which it was dissolved has been evaporated; a residue. 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 residue of an estate