Mercurial Mercurial > repos > Old_HOL / file revision
summary | shortlog | changelog | graph | tags | bookmarks | branches | files | changeset | file | latest | revisions | annotate | diff | comparison | raw | help
Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
ex/PL0.thy
author nipkow
Fri, 03 Feb 1995 16:21:45 +0100
changeset 209 cc7ad90039b9
parent 91 a94029edb01f
permissions -rw-r--r--
Add dependence on ex/String.thy/ML

(*  Title: 	HOL/ex/pl0.thy
    ID:         $Id$
    Author: 	Tobias Nipkow
    Copyright   1994  TU Muenchen

Syntax of propositional logic formulae.
*)

PL0 = HOL +
datatype
    'a pl = false | var ('a) ("#_") | "->" ('a pl,'a pl) (infixr 90)
end
Old_HOL