florian.haftmann at informatik.tu-muenchen.de
Tue Oct 28 08:12:53 CET 2008
> :( I also failed a few weeks ago to instantiate the fold combinator to
> iterate function composition ...
Hmmm... perhaps "fold (op o) id id" is what you want in that case.
> But is this restriction fundamental or does it happen to be there?
Well, the type classes in Isabelle are an instance of order-sorted
algebra which demands type arguments to be free. Perhaps it is possible
to relax this without smashing the meta theory (I don't know the
answer). Anyway, this would mean a lot of work...
-------------- next part --------------
A non-text attachment was scrubbed...
Size: 252 bytes
Desc: OpenPGP digital signature
More information about the isabelle-dev