Mathlib v3 is deprecated. Go to Mathlib v4

Theorem nat.preimage_closed_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_closed_ball View 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_closed_ball View on Github →