Mathlib v3 is deprecated. Go to Mathlib v4

Theorem set.nontrivial.preimage

Modification history

2022-12-07 20:30

src/data/set/basic.lean

refactor(data/set/basic): move image, preimage, and range to a new file (#17842) …

Modified set.nontrivial.preimage View on Github →

2022-08-16 13:24

src/data/set/basic.lean

feat(data/set/basic): Add `set.nontrivial` predicate and API (#15867) …

Added set.nontrivial.preimage View on Github →