Reviewed baseline: 670864385024041d24612cf620054c1975473928 (PR77), refreshed by the coordinator; worktree HEAD at review: b914ac47e8006951a22d030e920d592243e7e0fe. Read AGENTS, the new brief, the coordinator’s recorded full-register review, relevant conclusion/continuation entries, current checkpoint and frozen-group summaries, MISSING, PR76’s derivation and PR77 reviews 03, 04 and 08. This is a bounded paper method audit, not a replay of historical proofs. Both missing-original recovery groups remain OPEN.
Wall check: Same open gap — ZERO-GEOMETRY, NS100/101, PR76–77. What changes: one specific regrouping exposes prime-factor-dependent divisor variances. It supplies an arithmetic identity, but no independently estimating inequality. No candidate is admitted. No scan, certificate, row, thaw, version or outreach was undertaken.
Try to collapse the two Mellin factors by their product index, then use a completed Poisson/Voronoi summation to estimate the resulting signed divisor blocks. This differs from applying an ordinary theta addition identity at mismatched moduli: it keeps both complete factors and exposes an exact prime-power coefficient. It is still only a method proposal until a signed block bound is supplied.
Write, with s-derivatives denoted by dots,
s = 1/2+i*r, p = r^2+1/4,
g(s) = pi^(-s/2)*Gamma(s/2), Lambda(s)=g(s)*zeta(s),
A(s) = s*(s-1)*g(s)/2, xi(s)=A(s)*zeta(s),
C(s) = (log A)''(s)
= -1/s^2-1/(s-1)^2+psi1(s/2)/4.
D(s) = zeta(s)*zeta''(s)-zeta'(s)^2.
On Re(s)>1, absolute convergence permits multiplication and rearrangement:
D(s) = sum_(n>=1) c(n)*n^(-s),
c(n) = (1/2)*sum_(d|n) [log d-log(n/d)]^2,
zeta(s)^2 = sum_(n>=1) d(n)*n^(-s).
Here d(n) is the divisor count; it is not a freely chosen coefficient. If n=prod p^a, finite independent divisor-exponent averaging gives exactly
c(n) = d(n)/6 * sum_(p^a || n) a*(a+2)*(log p)^2.
For a prime, c(p)=(log p)^2; c(1)=0. The formula follows because the mean of 2j-a, for j=0,…,a, is zero and its mean square is a(a+2)/3. Mixed prime contributions cancel in this finite variance computation. This is the step that uses the original Euler coefficients and unique factorization, beyond reflection symmetry.
The complete identity to which an estimate would have to transfer is
J(r) = 4*(xi*xi''-xi'^2)(s)
= p^2*g(s)^2 * [D(s)+C(s)*zeta(s)^2]. (1)
At s=1/2+ir this value is real. Formula (1) follows from X(r)=xi(s)/2 and the product rule. It retains the gamma contribution and the two polynomial-completion terms, and is precisely PR76’s complete J. No division by zeta occurs, so zeros and multiplicities are retained. J>=0 would give first-Laguerre positivity only.
The Dirichlet identities just written have their ordinary absolute-convergence domain Re(s)>1. They cannot be evaluated termwise at Re(s)=1/2. Even sum d(n)/sqrt(n) diverges. A positive-coefficient observation in the right half-plane is therefore not an estimate on the required line.
One legitimate starting point for completion is the complete two-shift product
P(s,z)=Lambda(s+z)*Lambda(s-z),
(1/2)*partial_z^2 P(s,0)
= Lambda(s)*Lambda''(s)-Lambda'(s)^2.
Its exact functional equation is P(s,z)=P(1-s,z). Multiplying by the corresponding two polynomial factors gives the xi product and includes the rest of (1). Thus any smoothed Mellin contour construction must first retain the complete two-variable product, including poles/residues and parameter derivatives of gamma and smoothing weights. An unsmoothed finite Dirichlet block is not that completed object.
This starting point avoids the illegitimate full-line theta-summand interchange catalogued in PR77 review 03. It does not repair that interchange retroactively. Nor can the two theta moduli be set equal, or the parity/coupling conditions of PR75 be discarded. A correctly derived completed divisor formula would just be another representation of the full pair.
I did not import a prior-art Voronoi theorem for c(n). Parameter differentiation of a generalized divisor identity would require its full statement, domain, differentiation control and residue terms. An arXiv discovery search supplies no substitute for that applicability check. No such theorem is being claimed to prove a sign here.
The proposed estimating technique was to exploit c(n)>=0, separate the explicit summatory main terms, and control completed remainder blocks by absolute exponential-sum/discrepancy estimates. There is no independently positive main quantity in this scheme on the critical line.
Already an individual uncompleted coefficient contribution in (1), for fixed n>=2, is
T_n(r) = p^2*Re{g(1/2+i*r)^2
*[c(n)+C(1/2+i*r)*d(n)]*n^(-1/2-i*r)}.
Its dominant phase as r tends to positive infinity is
r*log(r/(2*pi*n))-r-pi/4+O(1/r).
Stirling’s expansion gives C(1/2+ir)=O(1/r), while c(n)>0 is fixed. The phase grows without bound and is eventually strictly increasing. Consequently the leading cosine takes both signs along arbitrarily large sequences; the lower-order completion coefficient does not turn this uncompleted block into a nonnegative block. This is an elementary check of the suggested termwise inference, not a counterexample to a fully completed block or to J.
A finite fixed square prefix is an even less suitable substitute: PR73 already proves its eventual first-Laguerre failure, including the nonzero reflection jet. The proposed product-index regrouping does not erase that fact. A valid completion must retain infinite complementary terms and their mixed contribution.
One can instead leave all oscillatory blocks intact and hypothesize a lower bound for their sum. But without a separate cancellation mechanism this is merely (1)’s sign again. Likewise, a summatory-error bound could justify continuation or control the magnitude of a remainder, yet its absolute value cannot supply the absent lower main term. This is a failure to provide a method, not a theorem that no refined signed divisor estimate can work.
Because item 4 has no estimating step and the partial version leaves item 5 unfilled, this is a stop specification, not an admissible conjectural candidate. Requiring an estimate to be proved before admission would be too strict; requiring that an actual technique be named is appropriate.
Budget/decision: this bounded paper attempt ends here; allocate zero computation budget to the coefficient-positivity/Voronoi-completion idea as presently stated. Success of a future independently formulated signed block lemma would change the first-Laguerre proof obligation through (1), not establish RH. The present failure only rejects this missing-method proposal and its termwise shortcut. It leaves original arithmetic Poisson methods open.
Final wall check: Same open gap. Closest: PR77 reviews 03/04 and PR76. Prime-factor structure was exposed, but the coupled signed estimate remains absent. Stop this proposer lane; no row, thaw or version.