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4 (* ||A|| A project by Andrea Asperti *)
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7 (* ||T|| The HELM team. *)
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15 (* This file was automatically generated: do not edit *********************)
17 set "baseuri" "cic:/matita/CoRN-Decl/model/non_examples/Npos_no_monoid".
21 (* $Id: Npos_no_monoid.v,v 1.5 2004/04/08 08:20:34 lcf Exp $ *)
23 include "model/semigroups/Npossemigroup.ma".
25 include "algebra/CMonoids.ma".
27 (*#* **Non-example of a monoid: $\langle$#⟨#[Npos],[[+]]$\rangle$#⟩#
28 There is no right unit for the addition on the positive natural numbers.
31 inline "cic:/CoRN/model/non_examples/Npos_no_monoid/no_rht_unit_Npos.con".
33 (*#* Therefore the set of positive natural numbers doesn't form a group with
37 inline "cic:/CoRN/model/non_examples/Npos_no_monoid/no_monoid_Npos.con".