| author | paulson |
| Mon, 14 Aug 1995 13:42:27 +0200 | |
| changeset 1228 | 7d6b0241afab |
| parent 1168 | 74be52691d62 |
| permissions | -rw-r--r-- |
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(* Title: HOLCF/dnat2.thy |
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ID: $Id$ |
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Author: Franz Regensburger |
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Copyright 1993 Technische Universitaet Muenchen |
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Additional constants for dnat |
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*) |
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Dnat2 = Dnat + |
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consts |
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iterator :: "dnat -> ('a -> 'a) -> 'a -> 'a"
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defs |
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iterator_def "iterator == fix`(LAM h n f x. |
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dnat_when `x `(LAM m.f`(h`m`f`x)) `n)" |
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end |
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(* |
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iterator`UU`f`x = UU |
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iterator`dzero`f`x = x |
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n~=UU --> iterator`(dsucc`n)`f`x = f`(iterator`n`f`x) |
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*) |
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