conull

co- +‎ null

conull (not comparable)

1. (mathematics) Having a null complement
   • 2016, Anton Bernshteyn, “Measurable versions of the Lovász Local Lemma and measurable graph colorings”, in arXiv‎:

     Moreover, if the combinatorial structure on ${\displaystyle X}$ is "induced" by the ${\displaystyle [0;1]}$-shift action of a countable group ${\displaystyle \Gamma }$, then, even without any local finiteness assumptions, there is a Borel choice for ${\displaystyle f}$ which satisfies the constraints on an invariant conull set (i.e., with ${\displaystyle \epsilon =0}$).