| author | nipkow |
| Sat, 18 Nov 1995 14:55:44 +0100 | |
| changeset 1344 | f172a7f14e49 |
| parent 1168 | 74be52691d62 |
| child 1479 | 21eb5e156d91 |
| permissions | -rw-r--r-- |
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(* Title: HOLCF/ssum1.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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Partial ordering for the strict sum ++ |
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*) |
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Ssum1 = Ssum0 + |
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consts |
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less_ssum :: "[('a ++ 'b),('a ++ 'b)] => bool"
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rules |
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less_ssum_def "less_ssum s1 s2 == (@z. |
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(! u x.s1=Isinl(u) & s2=Isinl(x) --> z = (u << x)) |
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&(! v y.s1=Isinr(v) & s2=Isinr(y) --> z = (v << y)) |
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&(! u y.s1=Isinl(u) & s2=Isinr(y) --> z = (u = UU)) |
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&(! v x.s1=Isinr(v) & s2=Isinl(x) --> z = (v = UU)))" |
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end |
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