OAI/Analysis/LipschitzHilbert/Fourier/RescaledAnnularSymbol.lean
3 declarations, 0 contain sorry, 0 declared as axioms
The fixed angular enlargement is an exact change of normalized coordinates. The annular cutoff and the compact master symbol are still one on every contributing frequency.
- theorem
OAI.LipschitzHilbert.PacketRepresentation.rescaled_symbol_coordinatesline 11 - theorem
OAI.LipschitzHilbert.PacketRepresentation.rescaled_localized_symbol_eqline 20 - theorem
OAI.LipschitzHilbert.PacketRepresentation.vertical_annulus_from_windowline 56Source documentation
A vertical frequency window inherits the original annulus from its center and width, with the exact endpoint allowance.
theorem vertical_annulus_from_window (w W center eta B c C : ℝ) (hw : 0<w) (hW : 0<W) (hlo : c+B*(w/W)≤w*center) (hhi : w*center+B*(w/W)≤C) (hY : |symbolY W eta center|≤B) : c≤w*eta ∧ w*eta≤C := by …