t-conorm

Etymology
Short for.

Noun

 * 1)  A binary function from [0,1] &times; [0,1] to [0,1], which, when given (a,b) as input, returns one minus a t-norm of (1 &minus; a, 1 &minus; b).
 * The t-conorm $$\sqrt{x^2 + y^2 - x^2 y^2}$$ is dominated by the t-conorm $$x + y - xy$$, which is in turn dominated by the t-conorm $${x + y \over 1 + x y}$$.
 * A t-conorm acts as a disjunction in fuzzy logic or as a union in fuzzy set theory. When one of its arguments is 0, it returns its other argument; when one of its arguments is 1, it returns 1. It is both associative and commutative, and its partial derivatives with respect to its parameters are non-negative.