author | lcp |
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parent 625 | 119391dd1d59 |
child 1168 | 74be52691d62 |
permissions | -rw-r--r-- |
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(* Title: HOLCF/tr1.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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Introduce the domain of truth values tr = one ++ one |
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The type is axiomatized as the least solution of a domain equation. |
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The functor term that specifies the domain equation is: |
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FT = <++,K_{one},K_{one}> |
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For details see chapter 5 of: |
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[Franz Regensburger] HOLCF: Eine konservative Erweiterung von HOL um LCF, |
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Dissertation, Technische Universit"at M"unchen, 1994 |
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*) |
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Tr1 = One + |
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types tr 0 |
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arities tr :: pcpo |
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consts |
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abs_tr :: "one ++ one -> tr" |
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rep_tr :: "tr -> one ++ one" |
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TT :: "tr" |
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FF :: "tr" |
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tr_when :: "'c -> 'c -> tr -> 'c" |
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rules |
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abs_tr_iso "abs_tr[rep_tr[u]] = u" |
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rep_tr_iso "rep_tr[abs_tr[x]] = x" |
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TT_def "TT == abs_tr[sinl[one]]" |
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FF_def "FF == abs_tr[sinr[one]]" |
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tr_when_def "tr_when == (LAM e1 e2 t.when[LAM x.e1][LAM y.e2][rep_tr[t]])" |
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end |
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