doc-src/Intro/prod.thy
author wenzelm
Wed, 11 Apr 2012 11:44:21 +0200
changeset 47420 0dbe6c69eda2
parent 105 216d6ed87399
permissions -rw-r--r--
just one dedicated execution per document version -- NB: non-monotonicity of cancel always requires fresh update; explicit terminate_execution; tuned source structure;

Prod = FOL +
types   "*" 2                                 (infixl 20)
arities "*"     :: (term,term)term
consts  fst     :: "'a * 'b => 'a"
        snd     :: "'a * 'b => 'b"
        Pair    :: "['a,'b] => 'a * 'b"       ("(1<_,/_>)")
rules   fst     "fst(<a,b>) = a"
        snd     "snd(<a,b>) = b"
end