codual

co- +‎ dual

codual (not comparable)

1. (mathematics, of a relation) complement dual.

   For a relation ${\displaystyle P\subseteq A^{2}}$, the codual relation is defined as ${\displaystyle P^{\mathit {cd}}=\left\{(x,y)\in A^{2}\mid (y,x)\not \in P\right\}}$.

• coduality