OAI/Analysis/FiniteFactor/CrossedProduct/OrbitNormalization.lean
4 declarations, 0 contain sorry, 0 declared as axioms
- theorem
OAI.FiniteFactor.sourceCocycle_orbit_ratioline 12 - theorem
OAI.FiniteFactor.sourceTorusRepresentative_rotateline 19 - theorem
OAI.FiniteFactor.fiber_rotated_invariantline 32Source documentation
Covariance and invariance give the rotated range inclusion after removing the shift. This is an identity of bounded operators, not a range assumption.
theorem fiber_rotated_invariant (A B W : SourceFiberHilbert →L[ℂ] SourceFiberHilbert) (n : ℤ) (hc : fiberShift (-n) * A = B * fiberShift (-n)) (hi : (1-A)*W*A = 0) : (1-B)*(fiberShift (-n)*W)*A = 0 := by …Mentions: OAI.FiniteFactor.SourceFiberHilbert, OAI.FiniteFactor.fiberShift
- theorem
OAI.FiniteFactor.sourceCappedRatio_orbit_diagonalline 47Source documentation
On ordered actual orbit pairs, the capped diagonal is exactly the normalized weighted shift power.
theorem sourceCappedRatio_orbit_diagonal (θ : SourceCoordinate → ℝ) (z : SourceTorus) (n : ℕ) (hx : finiteFloorSupport θ (sourceTorusRepresentative z)) (hord : ∀ i, sourceTorusRepresentative z i ≤ sourceTorusRepresentative (sourceTorusRotate θ n z) i) (W : SourceFiberHilbert →L[ℂ] SourceFiberHilbert) (hW : ∀ (v : SourceFiberHilbert) (k : ℤ), W v k = (sourceCocycle θ sourceLogWeight n (coordinateRotate θ (k-(n : ℤ)) (sourceTorusRepresentative z)) : ℂ) * v (k-(n : ℤ))) : fiberDiagonal (sourceCappedRatio θ (z,sourceTorusRotate θ n z)) (sourceCappedRatio_norm θ (z,sourceTorusRotate θ n z)) = (sourceCocycle θ sourceLogWeight n (sourceTorusRepresentative z) : ℂ)⁻¹ • …Mentions: OAI.FiniteFactor.SourceCoordinate, OAI.FiniteFactor.SourceTorus, OAI.FiniteFactor.finiteFloorSupport, OAI.FiniteFactor.sourceTorusRepresentative, OAI.FiniteFactor.sourceTorusRotate, OAI.FiniteFactor.SourceFiberHilbert, OAI.FiniteFactor.sourceCocycle, OAI.FiniteFactor.sourceLogWeight, OAI.FiniteFactor.coordinateRotate, OAI.FiniteFactor.fiberDiagonal, OAI.FiniteFactor.sourceCappedRatio, OAI.FiniteFactor.sourceCappedRatio_norm