bugfix concerning claset(), added limited support for ALLGOALS + fast_tac etc.
(* Title: HOLCF/Discrete0.ML
ID: $Id$
Author: Tobias Nipkow
License: GPL (GNU GENERAL PUBLIC LICENSE)
Proves that 'a discr is a po
*)
Goalw [less_discr_def] "(x::('a::type)discr) << x";
by (rtac refl 1);
qed "less_discr_refl";
Goalw [less_discr_def]
"!!x. [| (x::('a::type)discr) << y; y << z |] ==> x << z";
by (etac trans 1);
by (assume_tac 1);
qed "less_discr_trans";
Goalw [less_discr_def]
"!!x. [| (x::('a::type)discr) << y; y << x |] ==> x=y";
by (assume_tac 1);
qed "less_discr_antisym";