src/Sequents/ILL/ILL_predlog.thy
author wenzelm
Tue Jun 01 12:33:50 2004 +0200 (2004-06-01)
changeset 14854 61bdf2ae4dc5
parent 6252 935f183bf406
child 17481 75166ebb619b
permissions -rw-r--r--
removed obsolete sort 'logic';
     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     plf
    11     
    12 consts
    13 
    14   "&"   :: "[plf,plf] => plf"   (infixr 35)
    15   "|"   :: "[plf,plf] => plf"   (infixr 35)
    16   ">"   :: "[plf,plf] => plf"   (infixr 35)
    17   "="   :: "[plf,plf] => plf"   (infixr 35)
    18   "@NG" :: "plf => plf"   ("- _ " [50] 55)
    19   ff    :: "plf"
    20   
    21   PL    :: "plf => o"      ("[* / _ / *]" [] 100)
    22 
    23 
    24 translations
    25 
    26   "[* A & B *]" == "[*A*] && [*B*]" 
    27   "[* A | B *]" == "![*A*] ++ ![*B*]"
    28   "[* - A *]"   == "[*A > ff*]"
    29   "[* ff *]"    == "0"
    30   "[* A = B *]" => "[* (A > B) & (B > A) *]"
    31   
    32   "[* A > B *]" == "![*A*] -o [*B*]"
    33   
    34 (* another translations for linear implication:
    35   "[* A > B *]" == "!([*A*] -o [*B*])" *)
    36 
    37 end