Mathlib v3 is deprecated. Go to Mathlib v4

Theorem equiv.preimage_subset

Modification history

2021-10-06 15:46
src/data/equiv/basic.lean
refactor(data/equiv): split out `./set` from `./basic` (#9560) …
Modified equiv.preimage_subsetView on Github →
2021-02-25 09:50
src/data/equiv/basic.lean
feat(data/equiv/basic): lemmas about images and preimages (#6398)
Added equiv.preimage_subsetView on Github →