Hi Andreas, > Let me ask something stupid: > why exactly do you guys axiomatize 'a set? > Sure it's admissable and all, but why not do this definitionally > via the obvious typedef?
the answer is rather technical: »typedef« in its current implementation needs set syntax / set type as prerequisite. Of course you could change »typedef« to be based on predicates, but there is some kind of unspoken agreement not to set one's hand on that ancient and time-honoured Gordon HOL primitive. Rgds., Florian -- Home: http://www.in.tum.de/~haftmann PGP available: http://home.informatik.tu-muenchen.de/haftmann/pgp/florian_haftmann_at_informatik_tu_muenchen_de
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