[Merged by Bors] - feat(order/filter): add map_neg_at_top, change some assumptions
#15237
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…5237) * add `map_neg_at_top`, `map_neg_at_bot`, `comap_neg_at_top`, and `comap_neg_at_bot`; * add `disjoint_pure_at_top`, `disjoint_pure_at_bot`, `not_tendsto_const_at_top`, `not_tendsto_const_at_bot`; * more lemmas about `order_iso` and `at_top`/`at_bot` up, no modifications to the code; * rename `tendsto_at_top_iff_tends_to_neg_at_bot` to `tendsto_neg_at_top_iff`, swap LHS and RHS, mark as `@[simp]`; * rename `tendsto_at_bot_iff_tends_to_neg_at_top` to `tendsto_neg_at_bot_iff`, swap LHS and RHS, mark as `@[simp]`; * use `n ≠ 0` instead of `1 ≤ n` in `tendsto_pow_at_top`, `tendsto_const_mul_pow_at_top`, `tendsto_const_mul_pow_at_top_iff`, `tendsto_neg_const_mul_pow_at_top`, `tendsto_neg_const_mul_pow_at_top_iff`.
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map_neg_at_top, change some assumptionsmap_neg_at_top, change some assumptions
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Jul 23, 2022
…5237) * add `map_neg_at_top`, `map_neg_at_bot`, `comap_neg_at_top`, and `comap_neg_at_bot`; * add `disjoint_pure_at_top`, `disjoint_pure_at_bot`, `not_tendsto_const_at_top`, `not_tendsto_const_at_bot`; * more lemmas about `order_iso` and `at_top`/`at_bot` up, no modifications to the code; * rename `tendsto_at_top_iff_tends_to_neg_at_bot` to `tendsto_neg_at_top_iff`, swap LHS and RHS, mark as `@[simp]`; * rename `tendsto_at_bot_iff_tends_to_neg_at_top` to `tendsto_neg_at_bot_iff`, swap LHS and RHS, mark as `@[simp]`; * use `n ≠ 0` instead of `1 ≤ n` in `tendsto_pow_at_top`, `tendsto_const_mul_pow_at_top`, `tendsto_const_mul_pow_at_top_iff`, `tendsto_neg_const_mul_pow_at_top`, `tendsto_neg_const_mul_pow_at_top_iff`.
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map_neg_at_top,map_neg_at_bot,comap_neg_at_top, andcomap_neg_at_bot;disjoint_pure_at_top,disjoint_pure_at_bot,not_tendsto_const_at_top,not_tendsto_const_at_bot;order_isoandat_top/at_botup, no modifications to the code;tendsto_at_top_iff_tends_to_neg_at_bottotendsto_neg_at_top_iff, swap LHS and RHS, mark as@[simp];tendsto_at_bot_iff_tends_to_neg_at_toptotendsto_neg_at_bot_iff, swap LHS and RHS, mark as@[simp];n ≠ 0instead of1 ≤ nintendsto_pow_at_top,tendsto_const_mul_pow_at_top,tendsto_const_mul_pow_at_top_iff,tendsto_neg_const_mul_pow_at_top,tendsto_neg_const_mul_pow_at_top_iff.