Re: [isabelle] Using declare to remove rules from auto and safe

Depends if it is a simp rule or a logic rule:

For logic rules:
  declare exI[rule del]

For simp rules use:
  declare fun_eq_iff[simp del]

Am Mittwoch, den 28.10.2015, 13:58 +0100 schrieb nemouchi:
> Hi all,
>   I want to remove some rules that auto and safe use on proof context.
>   Is it possible to use declare and remove a given rule from the set of
>   rules inside auto and safe?
>   If yes, can someone give me an example  on how can we do that (the
>   options that declare needs) ? example removing a given rule used by
>   safe!
>   It would be helpful if someone can link a document
>   on the command declare.
>   Best,
>   Yakoub.

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