src/Sequents/ILL/ILL_predlog.thy
author wenzelm
Fri Feb 05 21:14:17 1999 +0100 (1999-02-05)
changeset 6252 935f183bf406
child 14854 61bdf2ae4dc5
permissions -rw-r--r--
examples made separate dirs;
     1 (* 
     2     File:	 /Nfs/toton/usr20/sk/isa_files/ll/NEW/pred_log.thy
     3     Theory Name: pred_log
     4     Logic Image: HOL
     5 *)
     6 
     7 ILL_predlog  =  ILL +
     8 
     9 types
    10 
    11     plf
    12     
    13 arities
    14 
    15     plf :: logic
    16     
    17 consts
    18 
    19   "&"   :: "[plf,plf] => plf"   (infixr 35)
    20   "|"   :: "[plf,plf] => plf"   (infixr 35)
    21   ">"   :: "[plf,plf] => plf"   (infixr 35)
    22   "="   :: "[plf,plf] => plf"   (infixr 35)
    23   "@NG" :: "plf => plf"   ("- _ " [50] 55)
    24   ff    :: "plf"
    25   
    26   PL    :: "plf => o"      ("[* / _ / *]" [] 100)
    27 
    28 
    29 translations
    30 
    31   "[* A & B *]" == "[*A*] && [*B*]" 
    32   "[* A | B *]" == "![*A*] ++ ![*B*]"
    33   "[* - A *]"   == "[*A > ff*]"
    34   "[* ff *]"    == "0"
    35   "[* A = B *]" => "[* (A > B) & (B > A) *]"
    36   
    37   "[* A > B *]" == "![*A*] -o [*B*]"
    38   
    39 (* another translations for linear implication:
    40   "[* A > B *]" == "!([*A*] -o [*B*])" *)
    41 
    42 end