src/Sequents/ILL/ILL_predlog.thy
author wenzelm
Sun Sep 18 15:20:08 2005 +0200 (2005-09-18)
changeset 17481 75166ebb619b
parent 14854 61bdf2ae4dc5
permissions -rw-r--r--
converted to Isar theory format;
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(* $Id$ *)
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theory ILL_predlog
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imports ILL
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begin
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typedecl plf
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consts
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  "&"   :: "[plf,plf] => plf"   (infixr 35)
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  "|"   :: "[plf,plf] => plf"   (infixr 35)
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  ">"   :: "[plf,plf] => plf"   (infixr 35)
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  "="   :: "[plf,plf] => plf"   (infixr 35)
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  "@NG" :: "plf => plf"   ("- _ " [50] 55)
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  ff    :: "plf"
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  PL    :: "plf => o"      ("[* / _ / *]" [] 100)
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translations
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  "[* A & B *]" == "[*A*] && [*B*]"
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  "[* A | B *]" == "![*A*] ++ ![*B*]"
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  "[* - A *]"   == "[*A > ff*]"
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  "[* ff *]"    == "0"
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  "[* A = B *]" => "[* (A > B) & (B > A) *]"
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  "[* A > B *]" == "![*A*] -o [*B*]"
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(* another translations for linear implication:
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  "[* A > B *]" == "!([*A*] -o [*B*])" *)
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end