Re: [isabelle] HOL quantifiers in intro rules


Am Donnerstag, den 20.11.2014, 14:46 +0100 schrieb Johannes Hölzl:
> @Joachim: In your specific case you can also use intro:
> lemma "closed (⋂K)"
> proof (intro continuous_intros ballI)
>   fix S assume "S : K" shows "closed S"
>      ...
> qed

or simply

        proof rule+

where I don’t have to find the lemma names.

Am Donnerstag, den 20.11.2014, 15:30 +0100 schrieb Peter Lammich:
> As Johannes already pointed out, you could use intro.
> I usually use something like the following in those cases:
>   proof rule safe
>     fix S
>     assume ...	

I guess you mean "proof (rule, safe)". That is even nicer, as in my case
K is a "range f", so this gets resolved as well. Although this seems to
be just a small step from
        proof auto
which I believe is frowned upon.



Dipl.-Math. Dipl.-Inform. Joachim Breitner
Wissenschaftlicher Mitarbeiter

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