[Merged by Bors] - feat: add lemmas about List.Sorted
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semorrison
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* Add `List.Sorted.le_of_lt` and `List.Sorted.lt_of_le` (new). * Add `List.Sorted.rel_get_of_lt` and `List.Sorted.rel_get_of_le` (`get` versions of `nthLe` lemmas). * Add `List.sorted_ofFn_iff`, `List.sorted_lt_ofFn_iff`, and `List.sorted_le_ofFn_iff` (new). * Deprecate `List.monotone_iff_ofFn_sorted` in favor of `List.sorted_le_ofFn_iff`. * Rename `List.Monotone.ofFn_sorted` to `Monotone.ofFn_sorted`. In Lean 3, dot notation `hf.of_fn_sorted` used `lift.monotone.of_fn_sorted` if the `list` namespace is open. This is no longer the case in Lean 4.
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List.SortedList.Sorted
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* Add `List.Sorted.le_of_lt` and `List.Sorted.lt_of_le` (new). * Add `List.Sorted.rel_get_of_lt` and `List.Sorted.rel_get_of_le` (`get` versions of `nthLe` lemmas). * Add `List.sorted_ofFn_iff`, `List.sorted_lt_ofFn_iff`, and `List.sorted_le_ofFn_iff` (new). * Deprecate `List.monotone_iff_ofFn_sorted` in favor of `List.sorted_le_ofFn_iff`. * Rename `List.Monotone.ofFn_sorted` to `Monotone.ofFn_sorted`. In Lean 3, dot notation `hf.of_fn_sorted` used `lift.monotone.of_fn_sorted` if the `list` namespace is open. This is no longer the case in Lean 4.
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List.Sorted.le_of_ltandList.Sorted.lt_of_le(new).List.Sorted.rel_get_of_ltandList.Sorted.rel_get_of_le(getversions ofnthLelemmas).List.sorted_ofFn_iff,List.sorted_lt_ofFn_iff, andList.sorted_le_ofFn_iff(new).List.monotone_iff_ofFn_sortedin favor ofList.sorted_le_ofFn_iff.List.Monotone.ofFn_sortedtoMonotone.ofFn_sorted. In Lean 3, dot notationhf.of_fn_sortedusedlift.monotone.of_fn_sortedif thelistnamespace is open. This is no longer the case in Lean 4.