Stream: Mirror: Isabelle Users Mailing List

Topic: [isabelle] Removing a rule from the intro! set


view this post on Zulip Email Gateway (Jan 31 2026 at 10:27):

From: Gidon Ernst <gidon.ernst@lmu.de>

Dear all,

maybe someone can help:
How do I remove a rule from the intro! set?
I have tried:

declare <rule>[intro! del]
apply (auto intro! del: <rule>)

(and also with intro instead of intro!),
but both are invalid syntax.

The rule in question is predicate1I, which interferes with by intended
proof strategy.

Best,
--
Gidon Ernst
Software and Computational Systems Lab, LMU Munich
https://www.sosy-lab.org/people/ernst/

view this post on Zulip Email Gateway (Jan 31 2026 at 11:09):

From: Makarius <makarius@sketis.net>

On 31/01/2026 11:27, Gidon Ernst wrote:

How do I remove a rule from the intro! set?
I have tried:

declare <rule>[intro! del]
  apply (auto intro! del: <rule>)

(and also with intro instead of intro!),
but both are invalid syntax.

Use "rule del" here, either as attribute or method modifier.

Makarius


Last updated: Jan 31 2026 at 12:53 UTC