[Merged by Bors] - chore(data/set/basic): add some lemmas to function.surjective
#2876
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This way they can be used with dot notation. Also rename `set.surjective_preimage` to `function.surjective.injective_preimage`. I think that the old name was misleading.
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This way they can be used with dot notation. Also rename `set.surjective_preimage` to `function.surjective.injective_preimage`. I think that the old name was misleading.
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This way they can be used with dot notation. Also rename `set.surjective_preimage` to `function.surjective.injective_preimage`. I think that the old name was misleading.
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function.surjectivefunction.surjective
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…prover-community#2876) This way they can be used with dot notation. Also rename `set.surjective_preimage` to `function.surjective.injective_preimage`. I think that the old name was misleading.
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This way they can be used with dot notation. Also rename
set.surjective_preimagetofunction.surjective.injective_preimage. I think that the old namewas misleading.