[Merged by Bors] - feat(topology): more lemmas about Ici and Iic neighborhoods #3474
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ADedecker
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urkud
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LGTM. While you're at it, could you please add instances |
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Co-authored-by: Yury G. Kudryashov <urkud@urkud.name>
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Main feature : add `tfae_mem_nhds_within_Ici` and `tfae_mem_nhds_within_Iic`, analogous to the existing `tfae_mem_nhds_within_Ioi` and `tfae_mem_nhds_within_Iio`, as well as related lemmas (again imitating the open case) I also added a few lemmas in `data/set/intervals/basic.lean` that were useful for this and a few upcoming PRs Co-authored-by: Anatole Dedecker <48656793+ADedecker@users.noreply.github.com>
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Main feature : add
tfae_mem_nhds_within_Iciandtfae_mem_nhds_within_Iic, analogous to the existingtfae_mem_nhds_within_Ioiandtfae_mem_nhds_within_Iio, as well as related lemmas (again imitating the open case)I also added a few lemmas in
data/set/intervals/basic.leanthat were useful for this and a few upcoming PRsThis does also contains preliminaries for L'Hopital's rule, although this only apply to a small part of the PR