Section WandFrame.
Context {L: Language}
{minL: MinimumLanguage L}
{sepconL: SepconLanguage L}
{wandL: WandLanguage L}
{Gamma: Provable L}
{minAX: MinimumAxiomatization L Gamma}
{sepconAX: SepconAxiomatization L Gamma}
{wandAX: WandAxiomatization L Gamma}.

Lemma wand_frame_ver: forall (x y z: expr),
|-- (x -* y) * (y -* z) --> (x -* z).