2 ||M|| This file is part of HELM, an Hypertextual, Electronic
3 ||A|| Library of Mathematics, developed at the Computer Science
4 ||T|| Department, University of Bologna, Italy.
6 ||T|| HELM is free software; you can redistribute it and/or
7 ||A|| modify it under the terms of the GNU General Public License
8 \ / version 2 or (at your option) any later version.
9 \ / This software is distributed as is, NO WARRANTY.
10 V_______________________________________________________________ *)
16 val initial_status: unit -> status
20 val finite: int -> level
26 val unknown: status -> Marks.mark -> level
28 val is_zero: level -> bool
30 val minus: level -> int -> level
32 val to_string: level -> string