Anyway, personally I have no strong opinion about this, so anybody who
wants to get hands on should feel invited to do so.
It would have been better to discuss such a change beforehand rather
than make it and then say that we are welcome to modify it.
Please recall:
The movement of the code setup for sets into the HOL-Main corpus also
brought this fold into List.thy.
The task of introducing 'a set as type constructor was, as I still deem,
too ambitious to depend on such a detail as the introduction of an
additional definition into List.thy.
Florian
--
PGP available:
http://home.informatik.tu-muenchen.de/haftmann/pgp/florian_haftmann_at_informatik_tu_muenchen_de
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