(* *)
(***********************************************************************)
+(*
+ Time-stamp: <Last modified on 2013-01-30 19:08:06 CET by Kim Nguyen>
+*)
+
exception InvalidUtf8Codepoint of int
val subscript : int -> string
val right_arrow : string
val left_arrow : string
val epsilon : string
+val big_sigma : string
val cap : string
val cup : string
val lnot : string