doc-src/Tutorial/Misc/Fib.thy
author berghofe
Fri, 28 Sep 2001 16:42:58 +0200
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Fib = WF_Rel +
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consts fib  :: nat => nat
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recdef fib "measure(%n. n)"
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    "fib 0 = 0"
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    "fib 1 = 1"
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    "fib (Suc(Suc x)) = fib x + fib (Suc x)"
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end