Instance TraverseVarIsIdentity_my_value_my_value : @TraverseVarIsIdentity my_value _ my_value _.Instance TraverseVarIsIdentity_my_value_my_term : @TraverseVarIsIdentity my_value _ my_term _.

Lemma lift_MyVAbs: forall w k t, lift w k (MyVAbs t) = MyVAbs (lift w (1 + k) t).