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

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  14
  15 include "ground/arith/nat_succ.ma".
  16 include "ground/arith/nat_iter.ma".
  17
  18 (* NON-NEGATIVE INTEGERS ****************************************************)
  19
  20 (* Rewrites with nsucc ******************************************************)
  21
  22 lemma niter_succ (A) (f) (n) (a): f (f^n a) = f^{A}(↑n) a.
  23 #A #f * //
  24 qed.