[isabelle-dev] [Spam] cardinality primitives in Isabelle/HOL?
lp15 at cam.ac.uk
Wed Jan 23 15:33:30 CET 2019
This makes perfect sense to me.
I suggest moving at least the definition of Fpow into Main (it’s small, and fundamental) while creating a new Library entry for my own new material.
> On 23 Jan 2019, at 12:48, Blanchette, J.C. <j.c.blanchette at vu.nl> wrote:
> Hi Larry,
> You wrote:
>> The theorem ordIso_iff_ordLeq is proved in BNF_Wellorder_Constructions, so clearly a lot of facts about cardinals are available already in Main.
> FYI: As you might already know or deduced from the name convention, the (co)datatype (a.k.a. "BNF") package is based on some cardinality material. When we moved the BNF package into Main, I surgically split the HOL-Cardinals theories into two, moving the exact dependencies into Main and leaving the rest outside. As a result, it's pretty random what's in Main and what's outside. The alternative -- moving all of HOL-Cardinals into Main -- seemed undesirable because it would slow down building Main quite a bit.
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