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Theorem set.preimage_subset_iff

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.preimage_subset_iffView on Github →
2018-08-28 17:33
data/set/basic.lean
feat(data/set/basic): some more basic set lemmas (#288)
Added set.preimage_subset_iffView on Github →