OAI/GroupTheory/PolycyclicRecognition/Geometry/WeightSamplingSupport.lean

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2 declarations, 0 contain sorry, 0 declared as axioms

Exact positive widths of the sampling polytope

  1. theorem OAI.PolycyclicRecognition.weightSampling_support_eq_norm line 15

    Source documentation

    Every defining halfspace is attained at its Euclidean contact point.

    theorem weightSampling_support_eq_norm
        {W I : Type*} [NormedAddCommGroup W] [InnerProductSpace ℝ W]
        [FiniteDimensional ℝ W] [Fintype I]
        (α : I → W →L[ℝ] ℝ) (hC : IsCompact (weightSamplingPolytope α))
        (i : I) (hi : α i ≠ 0) :
        sSup (α i '' weightSamplingPolytope α) = ‖α i‖ := by
    …

    Mentions: OAI.PolycyclicRecognition.weightSamplingPolytope

  2. theorem OAI.PolycyclicRecognition.bracketWordExponent_pos line 33

    Source documentation

    Every nonempty bracket word has strictly positive sampling width.

    Distinct definitions of this name: OAI/GroupTheory/PolycyclicRecognition/Algebra/WordExponentBounds.lean:15 (different declaration text). Qualify references as OAI.PolycyclicRecognition.bracketWordExponent_pos@path.

    theorem bracketWordExponent_pos
        {I : Type*} [Fintype I] [DecidableEq I]
        (s : I → ℝ) (hs : ∀ i, 0 < s i) (w : FreeMagma I) :
        0 < bracketWordExponent s w := by
    …

    Mentions: OAI.PolycyclicRecognition.bracketWordExponent