b64e5dec1e
This PR introduces projected minima and maxima, also known as "argmin/argmax", for lists under the names `List.minOn` and `List.maxOn`. It also introduces `List.minIdxOn` and `List.maxIdxOn`, which return the index of the minimal or maximal element. Moreover, there are variants with `?` suffix that return an `Option`. The change further introduces new instances for opposite orders, such as `LE.opposite`, `IsLinearOrder.opposite` etc. The change also adds the missing `Std.lt_irrefl` lemma.
18 lines
572 B
Text
18 lines
572 B
Text
/-
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Copyright (c) 2025 Lean FRO, LLC. All rights reserved.
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Released under Apache 2.0 license as described in the file LICENSE.
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Authors: Paul Reichert
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-/
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module
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prelude
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public import Init.Data.Order.Ord
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public import Init.Data.Order.Classes
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public import Init.Data.Order.ClassesExtra
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public import Init.Data.Order.Lemmas
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public import Init.Data.Order.LemmasExtra
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public import Init.Data.Order.Factories
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public import Init.Data.Order.FactoriesExtra
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public import Init.Data.Order.MinMaxOn
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public import Init.Data.Order.Opposite
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public import Init.Data.Order.PackageFactories
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