Stream: Archive Mirror: Isabelle Users Mailing List

Topic: [isabelle] Cannot interpret comm_monoid_set


view this post on Zulip Email Gateway (Aug 22 2022 at 15:48):

From: Andreas Lochbihler <andreas.lochbihler@inf.ethz.ch>
Dear experts of the algebraic type class hierarchy,

I noticed that in Isabelle2016-1, it is impossible to interpret the locale comm_monoid_set
because the theorem name "commute" is used both in abel_semigroup and comm_monoid_set,
which is a sublocale of abel_semigroup. Consequently, the command

interpretation foo: comm_monoid_set ... ...

raises the error

Duplicate fact declaration "Scratch.foo.commute" vs. "Scratch.foo.commute"

One can get around this by first interpreting abel_semigroup with the same parameters but
a different name prefix, but this is just a hack. Is it possible to rename one of the
commute lemmas before the next release to avoid the clash?

Best,
Andreas


Last updated: Nov 21 2024 at 12:39 UTC