Source-pinned research

Research proof index

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This index contains 199 research declarations. Search 10,000 more complete Mathlib declarations.

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Project-declaredLean 4.32.0

General hoelder

general_hoelder

Plain-language statement

A weighted Hölder lower bound for Fourier energy. If Δ\Delta lies in the η\eta-large spectrum of ff, m0m\ne0, and a weight ν\nu is at least 11 wherever ff is nonzero, then the order-mm energy of Δ\Delta weighted by ν^\widehat\nu is at least Δ2mη2mf12/f22|\Delta|^{2m}\eta^{2m}\|f\|_1^2/\|f\|_2^2.

additive combinatoricsarithmetic progressionsFourier analysis

Source project: Arithmetic Progressions Almost Periodicity

Person-level attribution pending.

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Project-declaredLean 4.32.0

Geometric series estimate

geometric_series_estimate

Plain-language statement

For every real x2x\ge2, the extended-nonnegative geometric series satisfies

n=02n/x2x.\sum_{n=0}^{\infty}2^{-n/x}\le2^x.

harmonic analysisFourier analysismeasure theory

Source project: Carleson formalization

Person-level attribution pending.

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Project-declaredLean 4.32.0

Dist strict Mono

Grid.dist_strictMono

Plain-language statement

If one grid cube II is strictly contained below another grid cube JJ, then the project’s phase distance at the finer cube is controlled by the phase distance at the coarser cube:

dI(f,g)C(a)dJ(f,g).d_I(f,g)\le C(a)\,d_J(f,g).

harmonic analysisFourier analysismeasure theory

Source project: Carleson formalization

Person-level attribution pending.

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