- eapply RComp; [ idtac | eapply pivotContext ].
- set (RComp rpf (RCanR _ )) as rpf'.
- set (RLeft ((mapOptionTree ξ (stripOutVars (v :: nil) ctx1),, [ξ v])) rpf') as qq.
+ eapply AComp; [ idtac | eapply pivotContext ].
+ set (AComp rpf (ACanR _ )) as rpf'.
+ set (ALeft ((mapOptionTree ξ (stripOutVars (v :: nil) ctx1),, [ξ v])) rpf') as qq.