OAI/GroupTheory/PolycyclicRecognition/Algebra/CouplingLocalL2.lean

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2 declarations, 0 contain sorry, 0 declared as axioms

Local square integrability of the coupling transfers

A square-integrable section transfer becomes locally square integrable after adding the continuous target height. This property is preserved by the actual change to inverse coordinates.

  1. theorem OAI.PolycyclicRecognition.pairTransferLift_memLp_compact line 30

    Source documentation

    The lifted transfer is square integrable on every compact subset of the first product chart.

    theorem pairTransferLift_memLp_compact
        (m : Measure G) [IsFiniteMeasureOnCompacts m]
        (μ : Measure (NormalizedPair G Λ)) [IsFiniteMeasure μ]
        (π : G →* Multiplicative W) (hπ : Continuous fun g => (π g).toAdd)
        {φ : NormalizedPair G Λ → W} (hφ : MemLp φ 2 μ)
        {K : Set (G × NormalizedPair G Λ)} (hK : IsCompact K) :
        MemLp (pairTransferLift π φ) 2 ((m.prod μ).restrict K) := by
    …

    Mentions: OAI.PolycyclicRecognition.NormalizedPair, OAI.PolycyclicRecognition.pairTransferLift

  2. theorem OAI.PolycyclicRecognition.inverseFiberTransfer_memLp_compact line 55

    Source documentation

    The corrected transfer in the inverse chart is locally square integrable for the coupling measure.

    theorem inverseFiberTransfer_memLp_compact
        (m : Measure G) [IsFiniteMeasureOnCompacts m]
        (μ : Measure (NormalizedPair G Λ)) [IsFiniteMeasure μ]
        (π l : G →* Multiplicative W)
        (hπ : Continuous fun g => (π g).toAdd) (hl : Continuous fun g => (l g).toAdd)
        {φ : NormalizedPair G Λ → W} (hφ : MemLp φ 2 μ)
        {K : Set (NormalizedPair G Λ × G)} (hK : IsCompact K) :
        MemLp (inverseFiberTransfer π l φ) 2 ((inversePairCoupling m μ).restrict K) := by
    …

    Mentions: OAI.PolycyclicRecognition.NormalizedPair, OAI.PolycyclicRecognition.inverseFiberTransfer, OAI.PolycyclicRecognition.inversePairCoupling