OAI/GroupTheory/PolycyclicRecognition/Analysis/SequenceFixedSliceVolume.lean

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Accessible fixed-slice volume along the profile-scale sequence

  1. theorem OAI.PolycyclicRecognition.fixedSlice_sequence_volume_exponent_le line 18

    Source documentation

    The geometric packing comparison for compact accessible endpoint sets. Haar volume supplies the lower count; only the image paths and the existing ambient path-packing theorem are used for the upper count.

    theorem fixedSlice_sequence_volume_exponent_le
        {N D G W : Type*} [Group N] [Group D] [Group G]
        [TopologicalSpace N] [MeasurableSpace N] [MeasurableMul N]
        [MetricSpace G] [IsTopologicalGroup G] [IsIsometricSMul G G] [ProperSpace G]
        [NormedAddCommGroup W] [NormedSpace ℝ W] {Λ : ℝ≥0}
        (scale : ℕ → ℝ) (hscale : Tendsto scale atTop atTop)
        (ι : N →* G) (κ : D →* G) (φ : D →* MulAut N)
        (μ : Measure N) [μ.IsMulLeftInvariant] [IsFiniteMeasureOnCompacts μ]
        (hφ : ∀ d, MeasurePreserving (φ d) μ μ)
        (hconj : ∀ d n, ι (φ d n) = κ d * ι n * (κ d)⁻¹)
        (hι : Topology.IsClosedEmbedding ι)
        (S : ℕ → Set N) (hS : ∀ n, IsCompact (S n))
    …