[isabelle-dev] Is theorem Pair_inject in Product_Type still considered legacy or duplicate?

[Florian Haftmann]

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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