fact: Definition valid_QE_proj := forall i bc (ex_i_bc := ('exists 'X_i, dnf_to_form [:: bc])%T) e, dnf_rterm bc -> reflect (holds e ex_i_bc) (qf_eval e (proj i bc)).
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat div seq) mathcomp(choice fintype finfun bigop prime binomial)