[isabelle-dev] Factorials and binomial coefficients

[Florian Haftmann]

Hi Amine,

> I left Fact.thy alone because it is necessary for building HOL. I moved
> it upwards though (now it imports Nat instead of RealDef). I added the
> other stuff to Binomial since it is "Library stuff" and not necessary
> for building HOL.

OK, I see.  This would even suggest to merge Fact.thy directly into
Nat.thy, but I have no strong opinion on this.

	Florian

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