fact: Definition dnf_rterm (cl : oclause R) := [&& all (@rterm R) cl.1, all (@rterm R) cl.2, all (@rterm R) cl.3 & all (@rterm R) cl.4].
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)