OAI/Topology/ArtinGroups/ParabolicIntersections/ParabolicReadBraid.lean

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The parabolic read respects braid relations by the reduced-word theorem.

  1. theorem OAI.HarmonicArtin.ParabolicIntersections.parabolicRead_word_eq line 17

    Source documentation

    Equal reduced galleries have equal positive reads in the parabolic.

    theorem parabolicRead_word_eq (w : M.Group) (u v : List S)
        (hu : (cs).IsReduced u) (hv : (cs).IsReduced v) (he : (cs).wordProd u=(cs).wordProd v) :
        wordArtin R (parabolicRead cs J w u)=wordArtin R (parabolicRead cs J w v) := by
    …

    Mentions: OAI.HarmonicArtin.wordArtin, OAI.HarmonicArtin.ParabolicIntersections.parabolicRead

  2. theorem OAI.HarmonicArtin.ParabolicIntersections.parabolicRead_braid line 31

    Source documentation

    The precise braid compatibility needed for the parabolic retraction.

    theorem parabolicRead_braid (w : M.Group) (i j : S) :
        wordArtin R (parabolicRead cs J w (altList i j (M i j))) =
          wordArtin R (parabolicRead cs J w (altList j i (M i j))) := by
    …

    Mentions: OAI.HarmonicArtin.wordArtin, OAI.HarmonicArtin.ParabolicIntersections.parabolicRead