[Merged by Bors] - fix: remove @[reducible] attribute from Function.injective #375
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I have low confidence about exactly what's going on in |
For the record, that's because lemmas like
No, they're fine. They're controlling reduction of something else, namely the type. bors r+ |
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In mathlib3, [`function.injective`](https://github.com/leanprover-community/lean/blob/4b58f26becf336a50cf037c3e2894b6f2938956e/library/init/function.lean#L73) is not reducible, so `Function.injective` should not be reducible here either. To avoid errors in `Order/Basic` ("@[ext] attribute only applies to structures or lemmas proving x = y"), we need to adjust `extAttribute` too. Fixes some problems seen in #372.
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In mathlib3,
function.injectiveis not reducible, soFunction.injectiveshould not be reducible here either.To avoid errors in
Order/Basic("@[ext] attribute only applies to structures or lemmas proving x = y"), we need to adjustextAttributetoo.Fixes some problems seen in #372.