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    "content": "($c_0 = -1/4$ identified exactly; residuals match $-1/4 - 1/(24n)$ to\nall printed digits), and $|S_f(n)| \\le 13.52$ for $n \\le 5000$\n(max at $n = 3298$) vs the traced worst-case $\\sim 2280$ there \u2014\nthe contour constants are $\\sim 170\\times$ loose, as documented.\n\\item Margin assembly (E-028, fully traced constants $A = 10.5$,\n$B_0 = 48$): crossover at $n = 75\\,451$; adopted $N_0 = 8\\times10^4$\nwith margin $16\\,020$ and positive derivative ($15\\,764$ with the\nformal development's majorant --- Step-4 footnote); convexity proved\n(D-057) and grid-confirmed to $N_1 \\approx 9\\times10^{24}$;\n$\\mathrm{margin}(N_1) = 2.458\\times10^{26}$. (First-estimate\nconstants $2/2$: crossover $32\\,871$; measured $0.9/1.0$: $30\\,217$.)\n\\end{itemize}\n\n\\section{Formal verification}\n\nThe inherited density theorem \\cite{anthropic2026riemann} is formally\nverified in Lean~4 (repository \\texttt{zeta-23-lean}, tag v1.0); this\nproject performed a full \\texttt{lake} rebuild (9010 jobs) and a live\n\\texttt{\\#print axioms} audit of all comparator statements, confirming\nthe published axiom profile verbatim: no axioms beyond \\texttt{propext},\n\\texttt{Classical.choice}, and \\texttt{Quot.sound}, with \\texttt{sorry}\noccurring only in the trusted challenge-statement stubs.\n\nThe new result of this paper is formalized in the companion\npackage \\texttt{NguyenRH1} (same toolchain, path-linked to the vendored\n\\texttt{zeta-23-lean} and its \\textsc{Mathlib} build; no new axioms are\nintroduced anywhere). The first tier is complete: the archimedean lower\nbound for $S_\\infty(n)$ and the margin convexity are machine-proved\n(\\texttt{sInfty\\_lower\\_bound}, \\texttt{marginTilde\\_convex}, and the\nchain-rule identity \\texttt{chain\\_rule\\_sqrt\\_shift}), each with axiom\nprofile exactly the three standard axioms above. A design note on the\nconvexity proof: the pen-and-paper argument uses eleven one-variable\nsign conditions, but the Lean development proves an eight-block\n$\\psi$-table plus a separate analytic bound for the $I_I$ term\n($\\widetilde B_4$); the divergence from the eleven-row table is that\n$\\widetilde B_4$ is not concave, so it is excluded from the $\\psi$\nmachinery and bounded directly. That direct bound is itself a worked\nexample of this project's measured-to-traced conversion: the grid\ncheck of E-029 (maximum $2n\\,|\\widetilde B_4''(n)| = 0.189$ on\n$[20, 10^4]$, with the decay argument covering the tail) is superseded\nby a fully analytic factor-monotonicity proof of the sufficient\ninequality $\\widetilde\\psi''(s) - \\widetilde\\psi'(s)/s \\le 1.316 < 2$\nfor $s \\ge \\sqrt{20}$, i.e.\\ $\\widetilde B_4''(n) < 1/(2n)$ for all\n$n \\ge 20$ (\\texttt{iimaj\\_bracket\\_bound},\n\\texttt{IIMaj\\_deriv2\\_lt}).\n\nThe second tier is complete in its assembly form. The headline\ntheorem \\texttt{lambda\\_pos\\_finite\\_height\\_verified} is\nmachine-proved from exactly three named hypotheses: the two\ncomputational-perimeter inputs of\nTheorem~\\ref{thm:finite-height-li} (Platt--Trudgian; the Li\nverifications) and a single named analytic hypothesis\n\\texttt{SfBoundProp}: the traced contour bound\n$|S_f(n)| \\le B(n)$ of Section~3 on the range\n$10^5 \\le n \\le (T_0-1)^2$. The two elementary evaluations of the\nexplicit margin function that the assembly consumes\n($\\mathrm{margin}(8{\\cdot}10^4) > 0$ and\n$\\mathrm{margin}(10^5) > \\mathrm{margin}(8{\\cdot}10^4)$) are discharged\nin the development itself, by certified rational interval bounds on\n$\\log$, $\\exp$, and $\\sqrt{\\cdot}$ (\\texttt{LiBasePoints.lean}).\nInside \\texttt{SfBoundProp}, the explicit\nzero-counting bounds of \\cite{trudgian2014} are treated as trusted\nperimeter on the same footing as the Platt--Trudgian certificate; the\nremaining content (the rectangle contour identity, the kernel\nestimates, and the reference-point bound for $\\zeta'/\\zeta$) is plain\ncomplex analysis. The margin majorant in the development is a mildly\nenlarged Trudgian-shape function (a negative-weight term dropped, at a\ncost of $\\approx 0.9\\sqrt n$ in the bound) chosen so that every\nconvexity block has provably negative $\\psi$; the axiom profile is\nunchanged --- the three standard axioms, no \\texttt{sorryAx}.\n\nThe remaining formalization target inside this paper is\n(ii$'$) the contour estimate inside \\texttt{SfBoundProp} (requires\nmeromorphic residue machinery on rectangles and partial-fraction bounds\nfor $\\zeta'/\\zeta$ --- a nontrivial but finite library task). The\nfinite-height Li theorem is, by design,\n\\emph{conditional} on computations (Platt--Trudgian's interval\narithmetic; the Li-coefficient verifications); formalizing the\n\\emph{reduction} leaves exactly those computational certificates\nas trusted inputs, which we regard as the honest formal target.\n\n\\section*{AI Contribution Statement}\nThis research was conducted with substantial assistance from two AI\nsystems: Kimi K3 (Moonshot AI), operated through the Claude Code\nharness (Anthropic), over an archived series of research sessions\n(project ledger: sessions 001--013). Machine contributions included:\nderivation drafting and constant-tracing (D-036/D-037/D-056/D-057),\nthe Lean~4 formalization of the Li chain (package \\texttt{NguyenRH1}:\n\\texttt{sInfty\\_lower\\_bound}, \\texttt{marginTilde\\_convex},\n\\texttt{lambda\\_pos\\_finite\\_height\\_verified}), the numerical\nexperiment suite (E-001--E-029), and adversarial self-audit (D-060:\nfour independent audit instances, $\\sim$55 claims checked, 10\ncorrections filed). All research direction, verification decisions,\nperimeter declarations, and final approval are the responsibility of\nthe human author, who serves as guarantor of the work. All\nmachine-produced mathematics was validated by machine-checked proof\n(Lean~4, axiom profiles as stated in Appendix~B), by cross-validated\ndeterministic computation, or is explicitly tagged otherwise in the\ntext. Session logs and audit trails are preserved in the project\narchive.\n\n\\section*{Acknowledgments}\nThe author thanks Moonshot AI (Kimi K3) and Anthropic (the Claude Code\nharness) for making their systems available for research use. The\nsubstantive record of machine assistance is the AI Contribution\nStatement above.\n\n\\bibliographystyle{plain}\n\\bibliography{references}\n\\end{document}",
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