[isabelle-dev] Deglobalizing HOL.thy

Jasmin Christian Blanchette jasmin.blanchette at gmail.com
Thu Aug 19 13:56:48 CEST 2010

Am 19.08.2010 um 13:15 schrieb Florian Haftmann:

>> One thing I don't get: if HOL.eq is already taken, why not map the equality symbol to something else?
> Well, eq seems more natural when looking at the traditional xsymbol
> syntax \<noteq> (although the corresponding abbreviation is named
> not_equal).  When using HOL.equal, there is always an uncertainty
> whether its HOL.equal or HOL.equals.  The existing HOL.eq_class.eq is so
> special that I would not concede it any influence on the naming of a
> fundamental HOL constant.
> Of course I am open to other suggestions.

If equality is called "eq", shouldn't implication be called "imp"? This would be consistent with "HOLogic.mk_imp" etc. But then "and" and "or" should perhaps be called "conj" and "disj". Hm... Food for thought.


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