exception ReferenceToCurrentProof
exception ReferenceToInductiveDefinition
val fdebug : int ref
-val whd : Cic.context -> Cic.term -> Cic.term
-val are_convertible : Cic.context -> Cic.term -> Cic.term -> bool
+val whd : ?subst:Cic.substitution -> Cic.context -> Cic.term -> Cic.term
+val are_convertible :
+ ?subst:Cic.substitution -> ?metasenv:Cic.metasenv -> Cic.context -> Cic.term -> Cic.term -> bool