fact: Definition neq_of_oclause (R : Type)(x : oclause R) := let: Oclause _ y _ _ := x in y.
imports: HB(structures) mathcomp.ssreflect.ssreflect mathcomp(ssrfun ssrbool eqtype ssrnat seq div choice fintype) mathcomp(bigop order ssralg finset fingroup zmodp) mathcomp(poly ssrnum)