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- **Added:**
  ``Cantor.v`` containing the Cantor pairing function and its inverse.
  ``Cantor.to_nat : nat * nat -> nat`` and ``Cantor.of_nat : nat -> nat * nat``
  are the respective bijections between ``nat * nat`` and ``nat``.
  (`#14008 <https://github.com/coq/coq/pull/14008>`_,
  by Andrej Dudenhefner).