proposition: Lemma sin6 (L : r1 ⨾ r2 ⨾ r3 ⨾ r4 ⨾ r5 ⨾ r6 ⊆ r) s : r1 ⨾ r2 ⨾ r3 ⨾ r4 ⨾ r5 ⨾ r6 ⨾ s ⊆ r ⨾ s.
proof: Proof. rewrite <- L, !seqA; vauto. Qed.
imports: HahnBase HahnList HahnRelationsBasic HahnEquational HahnFuneq HahnSets