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Theorem nat.preimage_ball

Modification history

2022-02-24 00:24
src/topology/instances/nat.lean
refactor(topology/instances): put `ℕ`, `ℤ`, and `ℚ` in separate files (#12207) …
Modified nat.preimage_ballView on Github →
2022-02-12 07:11
src/topology/instances/real.lean
feat(topology/instances/real): metric space structure on nat (#11963) …
Added nat.preimage_ballView on Github →