matita/matita/contribs/lambdadelta/ground/arith/pnat_two.ma

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  14
  15 include "ground/notation/functions/two_0.ma".
  16 include "ground/arith/pnat.ma".
  17
  18 (* POSITIVE INTEGERS ********************************************************)
  19
  20 interpretation
  21   "two (positive integers)"
  22   'Two = (psucc punit).