+ ?subst:Cic.substitution -> ?metasenv:Cic.metasenv ->
+ Cic.context -> Cic.term -> Cic.term -> CicUniv.universe_graph ->
+ bool * CicUniv.universe_graph
+val normalize:
+ ?delta:bool -> ?subst:Cic.substitution -> Cic.context -> Cic.term -> Cic.term
+
+(* performs an head beta/cast reduction *)
+val head_beta_reduce: Cic.term -> Cic.term