try to avoid races again (cf. 8c37cb84065f and fd3a36e48b09);
header {* Main HOL *}
theory Main
imports Plain Predicate_Compile Nitpick
begin
text {*
Classical Higher-order Logic -- only ``Main'', excluding real and
complex numbers etc.
*}
text {* See further \cite{Nipkow-et-al:2002:tutorial} *}
end