Partial Hadamard matrices in the cubic regime — Blueprint

7 Module guide

File-by-file map of the Lean formalization.

HadamardCn3Defs

Core definitions: \(d=\binom {n}{2}\), edge type, \(\psi \), \(\| \lambda \| ^2\), Gaussian scale \(\hat A_{n,4t}\), count scale \(A_{n,4t}\), normalized count \(N_{n,4t}/2^{4nt}\), matrix structure.

HadamardCn3TorusCount

Torus counting infrastructure: Fourier inversion, prefactors, combinatorial cycle formulas, hypercontractive bounds, Gaussian radial moments, quartic and quintic cumulant estimates.

HadamardCn3Moments

Moment bounds: fourth, sixth, and eighth moment estimates for polynomial corrections to the Gaussian integrand.

HadamardCn3MOO

Mossel–O’Donnell–Oleszkiewicz kernel infrastructure: row influence, kernel influence, the three-halves influence sum \(J(\lambda )\).

HadamardCn3WeakInvariance

Lindeberg replacement proof: hybrid vectors, Taylor expansion, moment matching, and the weak comparison theorem (Lemma 12 and Corollary 13).

HadamardCn3QuarticFiber

Quartic fiber analysis: peeling identity, ordered cycle formula, and pointwise quartic bounds.

HadamardCn3LocalGapBridge

Bridge estimates: log-expansion, small-ball decay, cubic phase bound, core-to-corrected-to-quartic-to-cubic bridge chain, primary annulus and far-shell integral bounds.

HadamardCn3LocalGapResidual

Residual estimates: primary core contribution, shell transport, annulus bound, far-shell bound, and the quantitative residual theorem (Proposition 25).

HadamardCn3LocalGapFixedN

Fixed-\(n\) analysis: shrinking-box infrastructure with \(\delta _t=t^{-2/5}\), fixed-\(n\) normalized-count and count asymptotics (Lemma 7).

HadamardCn3Asymptotics

Intermediate bridge: primary-box estimate on the Gaussian scale, normalized-count asymptotic combining primary and residual.

HadamardCn3ShortMain

Paper-facing theorems: Theorem 26 and Corollary 27, with the count normalization.

HadamardCn3ResidualBase

Residual base estimates: supporting lemmas for the residual route.