eliminated dead code, redundant bindings and parameters;
use === term operator, which is defined here;
handle Type.TYPE_MATCH, not arbitrary exceptions;
misc tuning and simplification;
header {* Main HOL *}
theory Main
imports Plain Quickcheck Map Recdef SAT
begin
text {*
Classical Higher-order Logic -- only ``Main'', excluding real and
complex numbers etc.
*}
text {* See further \cite{Nipkow-et-al:2002:tutorial} *}
end