| author | oheimb |
| Sat, 15 Feb 1997 17:55:11 +0100 | |
| changeset 2638 | 6c6a44b5f757 |
| parent 243 | c22b85994e17 |
| 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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rules |
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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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