[Merged by Bors] - feat(Function/Conjugate): add Semiconj.inverse_left
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* Add `Function.semiconj_iff_comp_eq` and `Function.Semiconj.inverse_left`. * Swap arguments of `Function.Semiconj.comp_left`. The old version is available as `Function.Semiconj.trans`. * Add docstrings.
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sgouezel
reviewed
Jan 16, 2024
| #align function.semiconj.inverses_right Function.Semiconj.inverses_right | ||
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| /-- If `f` semiconjugates `ga` to `gb` and `f'` is both a left and a right inverse of `f`, | ||
| then `f'` semiconjugates `gb` to `ga`. -/ | ||
| lemma inverse_left {f' : β → α} (h : Semiconj f ga gb) |
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the other lemma is called inverses_right (note the s). Can you uniformize between the two?
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AFAIR, my intention was to say that in case of inverses_right, we inverse 2 functions. Should I rename to inverse_right?
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I'm going to merge as is and open another PR if needed.
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* Add `Function.semiconj_iff_comp_eq` and `Function.Semiconj.inverse_left`. * Swap arguments of `Function.Semiconj.comp_left`. The old version is available as `Function.Semiconj.trans`. * Add docstrings.
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Pull request successfully merged into master. Build succeeded: |
mathlib-bors
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Semiconj.inverse_leftSemiconj.inverse_left
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Function.semiconj_iff_comp_eqand
Function.Semiconj.inverse_left.Function.Semiconj.comp_left.The old version is available as
Function.Semiconj.trans.