Hi Lukas, > in the changeset e8400e31528a of the Isabelle repository, you moved the > theorem Pair_inject in the Product_Type theory into a section called > "Legacy theorem bindings and duplicates". > > In my current development, I rely on the theorem Pair_inject, and it is > the most suitable rule for my purpose. > Why was it considered legacy or a duplicate? Does this still hold at the > current tip?
maybe I did confuse it with prod.exhaust or something like that.
Indeed, it does not seem to be a duplicate. Feel free to move.
Cheers,
Florian
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