Email Gateway (Aug 22 2022 at 09:13): Email Gateway (Aug 22 2022 at 09:13):From: Lars Hupel <hupel@in.tum.de>
It appears that there are two occurrences of "True" in HOL-Word:
lemma "True"
Auto solve_direct: The current goal can be solved directly with
HOL.TrueI: True
Word_Miscellaneous.z1pdiv2': True
Word_Miscellaneous.z1pmod2': True
The definitions of these lemmas are:
lemmas z1pmod2' = zero_le_one [THEN pos_zmod_mult_2, simplified]
lemmas z1pdiv2' = zero_le_one [THEN pos_zdiv_mult_2, simplified]
This is already the case for Isabelle2014.
I guess the header of the Word_Miscellaneous theory is even more spot on
than Florian intended :-)
header {* Miscellaneous lemmas, of at least doubtful value *}
Cheers
Lars
Email Gateway (Aug 22 2022 at 09:13):From: Gerwin Klein <Gerwin.Klein@nicta.com.au>
Looks like the [simplified] does now more than it used to.
We should definitely remove these two.
Cheers,
Gerwin
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Email Gateway (Aug 22 2022 at 09:13):From: Lars Hupel <hupel@in.tum.de>
We should definitely remove these two.
https://isabelle.in.tum.de/testboard/Isabelle/rev/243cee7c1e19
Email Gateway (Aug 22 2022 at 09:17):From: Florian Haftmann <florian.haftmann@informatik.tu-muenchen.de>
This forward-transformation style with a volatile background context is
inherently brittle and should be avoided.
In the HOL-Word theories, there are indeed plenty opportunities for
renovation.
Florian
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Last updated: Nov 21 2024 at 12:39 UTC