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fpvandoorn/carleson
Source indexedlemma ยท leanprover/lean4:v4.32.0

Tile.correlation_zero_of_ne_subset

Carleson.Antichain.TileCorrelation ยท Carleson/Antichain/TileCorrelation.lean:690 to 705

Source documentation

Part 2 of Lemma 6.1.5 (claim 6.1.44).

Exact Lean statement

lemma correlation_zero_of_ne_subset {p p' : ๐”“ X} (hle : ๐”ฐ p' โ‰ค ๐”ฐ p) {g : X โ†’ โ„‚}
    (hp : ยฌ(๐“˜ p' : Set X) โІ ball (๐”  p) (14 * D ^ ๐”ฐ p)) :
    โ€–โˆซ y, adjointCarleson p' g y * conj (adjointCarleson p g y)โ€–โ‚‘ = 0

Complete declaration

Lean source

Canonical source
Full Lean sourceLean 4
lemma correlation_zero_of_ne_subset {p p' : ๐”“ X} (hle : ๐”ฐ p' โ‰ค ๐”ฐ p) {g : X โ†’ โ„‚}    (hp : ยฌ(๐“˜ p' : Set X) โІ ball (๐”  p) (14 * D ^ ๐”ฐ p)) :    โ€–โˆซ y, adjointCarleson p' g y * conj (adjointCarleson p g y)โ€–โ‚‘ = 0 := by  contrapose! hp; rw [enorm_ne_zero] at hp  obtain โŸจy, hyโŸฉ := exists_ne_zero_of_integral_ne_zero hp  rw [mul_ne_zero_iff, map_ne_zero] at hy  refine Grid_subset_ball.trans fun x (mx : x โˆˆ ball (๐”  p') (4 * D ^ ๐”ฐ p')) โ†ฆ ?_  rw [mem_ball] at mx โŠข  calc    _ โ‰ค dist x (๐”  p') + dist (๐”  p') (๐”  p) := dist_triangle ..    _ < 4 * D ^ ๐”ฐ p' + (5 * D ^ ๐”ฐ p' + 5 * D ^ ๐”ฐ p) := by      gcongr      exact dist_lt_of_not_disjoint_ball        (not_disjoint_iff.mpr โŸจ_, range_support hy.1, range_support hy.2โŸฉ)    _ โ‰ค 4 * D ^ ๐”ฐ p + (5 * D ^ ๐”ฐ p + 5 * D ^ ๐”ฐ p) := by gcongr <;> exact one_le_realD a    _ = _ := by ring