ZFCρ Paper LXVI: Gradual Chiseling and the Spectral Bridge — Two-Regime Structure of the Centered Residual ACF
ZFCρ 第LXVI篇:渐进凿除与谱桥补偿——Centered Residual的两阶段结构
Paper 65 located the remaining core of Conjecture 59.1 as the spectral bound Ψ_η = O(j) for the adjacent-centered IC residual. This paper, through systematic hypothesis elimination (13 kills) and large-scale sub-block variance measurement, discovers that Ψ_η(W) exhibits a two-regime spectral structure.
§1. The Sole Open Core After Paper 65
Paper 65 established the conditional architecture for 59.1: B_j = B_count + B_resid + B_gauge, with count term controlled by Branch-Orthogonality (Paper 64), gauge defect controlled by j-smooth adjacent reference (Paper 65), and cross-term small. The sole remaining open core is:
Ψ_η(m_j) = O(j)
This paper investigates the scale structure of Ψ_η(W): why it does not grow as a simple power law, and what mechanism returns full-block Ψ to O(j).
§2. Via Negativa: The 13 Kills
Organized by layer, not chronology. Each kill eliminates a candidate shortcut mechanism.
Layer 1 — Coordinate and Low-Rank Illusions (Papers 64–65): Kill 1: β-pinning is restating (Null 1 permutes h(p)/p within each gap class, preserving Γ(g) and B_j identically). Kill 2: rank-one is not IC-specific (Null 1 gives higher s₁/s₂; rank-one energy comes from count marginal baseline, not IC recursion).
Layer 2 — Mean-Mode Artifacts (Paper 65): Kill 3: cross-branch anti-correlation is algebraic artifact of μ_A·μ_M < 0. Kill 4: global reference centering fails (μ_A ∼ C_A/2^j, scale mismatch). Kill 5: Haar-Carleson multiscale fails (geometric energy decay).
Layer 3 — State-Space and Pointwise ACF Shortcuts (Paper 66): Kill 6: gap-state transfer operator (τ ≈ 1, instant mixing, R² = 0.26). Kill 7: increment curvature/Abel (45% monotone violations, 50/50 convexity).
Layer 4 — Screening Models (Paper 66): Kill 8: naive Thermo layer hierarchy (ρ_ret × τ_0 = 2.77 > 1, diverges). Kills 9+10: exponential cutoff and pointwise tail compensation (initially interpreted in working notes as "negative ACF tail → Ψ_full = O(1)"; revealed as noise artifact from interpolated ACF; partially reversed at integrated level in §6).
Layer 5 — Ancestry Shortcuts (Paper 66): Kill 11: chain boundary = screening reset (mean chain = 1.3, too fragmented). Kill 12: GCD factor-sharing (constant across all lags). Kill 13: per-boundary constant attenuation (ACF × boundaries grows as lag^{0.7}).
After all five layers: simple positive exponential cutoff, pointwise negative-tail interpolation, and clean Thermo hierarchy are excluded; what remains is signed shell-level spectral bridge. Low-dimensional ancestry shortcuts are excluded; influence-cone overlap and renewal remain Paper 67 candidates. The surviving bare mechanism is distributed cumulative micro-erosion from min operations combined with block-scale spectral bridge compensation.
§3. Doukhan Confirmation: ACF Suffices for the Second-Order Target
θ_k/γ_k ≈ 2.5 universally across j = 25–32 and lag 1–2000. R²_nonlinear/R²_linear ≈ 0.94–1.01 at all lags. Under the conditional-mean and quantile-bin diagnostics tested, nonlinear predictors do not outperform linear predictors. For the second-order target Ψ, ACF is the sufficient empirical object.
§4. Regime 1: Gradual Chiseling and Power-Law Growth
Theorem 66.A (Local Micro-Erosion Law). If per-step erosion satisfies ε_k ∼ C/k + o(1/k), C > 0, then γ(k) = ∏(1 − ε_s) ∼ k^{−C}. Proof: ln γ(k) ≈ −C·H_k ≈ −C·ln k.
Empirically C ≈ 0.3. The mechanism: each logarithmic shell contributes constant erosion budget. Individual lag steps contribute ≈ C/k.
However, 66.A alone cannot yield 59.1. Power-law extrapolation to full block gives Ψ ∼ m_j^{1−C}/((1−C)(2−C)) ∼ (2^j/j)^{0.7}/1.19, which grows exponentially in j.
Power-law prediction vs reality:
| j | α_fit | Predicted Ψ/j | Actual Ψ_full/j | Overshoot |
|---|---|---|---|---|
| 27 | 0.47 | 137 | 0.015 | 9000× |
| 29 | 0.40 | 593 | 0.76 | 780× |
| 31 | 0.34 | 2674 | 0.91 | 2900× |
| 32 | 0.31 | 5551 | 15.66 | 350× |
Note: Actual Ψ_full/j values fluctuate wildly (0.015 to 15.66) because each j has only one block; the full-block identity Ψ = S²/(m·σ²) follows a χ²(1)-type distribution. The pattern shows no systematic super-linear growth. Sub-block ensemble statistics (§5) provide far more reliable estimates.
§5. Regime 2: Sub-Block Ψ Peak-Then-Crash
Sub-block Ψ(W) = Var(sub-block sums)/(W·σ²), computed with K = m/W sub-blocks. Confidence zones: K ≥ 30 (high), 10 ≤ K < 30 (medium), K < 10 (exploratory).
Universal pattern across j = 22–32: Ψ(W) grows as power law for W < 0.5% m_j, peaks, then crashes 5–40×.
| j | Peak W | Peak Ψ/j | Crash W | Crash Ψ/j |
|---|---|---|---|---|
| 25 | 10K | 2.53 | 100K | 1.20 |
| 29 | 100K | 13.36 | 5M | 1.02 |
| 31 | 1M | 35.08 | 10M | 2.73 |
| 32 | 1M | 59.28 | 10M | 10.50 |
§6. Integrated Tail Compensation
Kill 10 (pointwise negative tail) partially reversed: individual ACF values at large lag are at noise floor (|γ| < 0.003), but their integrated shell contribution produces genuine negative mass in the sub-block variance. Pointwise negative tail was not measurable; shell-integrated negative mass is real.
§7. Spectral Bridge Identity and Circularity Warning
The finite-block identity Ψ_full = S²/(m·σ²) diagnoses the spectral bridge but cannot prove 59.1, because small S = Ση is the target itself. Full-block identity serves as consistency check; sub-block Ψ is the independent empirical capstone.
Crucially, the sub-block Ψ measurement (§5) does not depend on the size of the full-block sum Ση. It is computed directly from the ensemble of K distinct sub-block sums, independent of whether Ση is small. This is Paper 66's primary empirical claim. The full-block identity serves only as a consistency cross-check and does not participate in the evidence chain.
§8. Conditional Theorems
Theorem 66.B (Spectral Bridge Criterion). Let M_+(j) = Σ_r S_j^+(r) be the total positive shell mass and M_-(j) = −Σ_r S_j^-(r) the total negative shell mass. Regime 1 (§4) implies M_+(j) grows as a power of m_j. If the negative shell mass nearly matches the positive:
M_-(j) = M_+(j) − g(j), where g(j) = O(j),
then Ψ_η(m_j) = M_+(j) − M_-(j) + O(1) = g(j) + O(1) = O(j), and Paper 65's conditional theorem yields the L² analogue of 59.1. The "spectral bridge" is this near-exact cancellation between positive and negative shell masses, with only an O(j) deficit.
Observation 66.C. The sub-block Ψ peak-then-crash is universal across j = 22–32, constituting direct empirical evidence that M_-(j) ≈ M_+(j) with small deficit.
§9. Two-Regime Unified Picture
Local chiseling explains why Ψ grows (Regime 1). Global spectral bridge explains why it does not keep growing (Regime 2). Both are needed: chiseling alone gives Ψ ∼ m^{0.7} (too large); constraint alone gives Ψ = 0 (tautological). Together: Ψ peaks then crashes to O(j).
§10. SAE Reading
The 13 kills and the surviving mechanism exhibit structural resonance: hypothesis elimination at the research level mirrors min-operation erosion at the mathematical level. Both are instances of chiseling (凿). The research process and the mathematical object share the same structural operation.
§11. Remaining Proof Task (Paper 67 Target)
Derive the spectral bridge compensation from IC recursion. Candidate frameworks: influence-cone overlap theory, branch-normal Ward identity, j-smooth reference flow, finite-block gauge pinning.
§12. Status Map
| Content | Status |
|---|---|
| Theorem 66.A: micro-erosion → power law | Conditional theorem |
| Theorem 66.B: spectral bridge → Ψ = O(j) | Conditional theorem |
| Observation 66.C: sub-block Ψ crash | Empirically confirmed |
| Power-law overshoot 100–10,000× | Empirically confirmed |
| 13 hypotheses killed | Empirical/analytic |
| Spectral bridge from IC recursion | Open (Paper 67) |
| Unconditional proof of 59.1 | Open (Paper 67–68) |