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14
15 include "ng_pts.ma".
16 include "nat/plus.ma".
17
18 (*
19 ndefinition x ≝ O.
20 *)
21 (*ndefinition y ≝ cic:/matita/tests/ng_commands/x.def(1).*)
22
23 axiom P: nat → Prop.
24
25 unification hint 0 (∀n. P (0 + n) = P n) .
26
27 ntheorem foo: ∀n. ∀H:(P (? + n) → Prop). ∀p:P n. H p → True.
28  #n; #H; #p; #_; napply I;
29 nqed. 
30
31 naxiom nnn: nat.