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SC-31: distinguish the recurrence-period bounds (lcm, Landau g(n), Erdős–Turán) - #967

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Source-correction unit SC-31, from audit #942 / gate #946.

Stacked on SC-28 (#962). This branch contains SC-28's head 51ba6652, brought in by normal merges, so against main the diff includes #962. It should merge after #962. Against corpus/sc28-assumption-scope, its own change is 16 files.

The flaw

Book ch18 §18.7 made three errors:

  • it called lcm(1..|S|) "Landau's function";
  • it gave N ~ e^{|S|} "for a generic permutation";
  • it presented e^{e^{10^122}} as the recurrence period, when that figure is only an upper bound, and on an |S| the corpus does not fix.

The correction

Three quantities are now kept distinct:

  • (1) ord | lcm(1..n), with ln lcm = ψ(n) ~ n.
  • (2) Landau's g(n), with ln g ~ √(n ln n).
  • (3) the Erdős–Turán typical order, ln ord ~ ½(ln n)². This holds only for σ uniform on S_n.

None of the three is an OI recurrence time without a justified model of φ, and the corpus adopts none.

The exactly linear fixed-graph rule (A5) has N ≤ q^D − 1 = |S| − 1. This bound is stated for that rule only. The state-dependent-geometry map (SM §3.1) and the rounded bijection (SM §4.2) are named as not covered.

How the remaining claims now read:

  • |S| is not fixed by visible data, and e^{10^122}-based figures are illustrative only.
  • Falsifiability is stated for a given |S|. For any finite T an |S| > T+1 is admissible, so no finite observation falsifies the framework as a whole.
  • App B :420 now says the period "can be" astronomically large.
  • The Rosser–Schoenfeld constant is dropped.

Sites: ch18, ch01, App A F8, App B :420, App C, book/README, the bibliography, Explainer :175, and the FULL mirror (exact). Explainer and FULL .tex/.pdf are regenerated.

Record: verification/audits/manuscript/intro-corpus-audit-20261026/tracks/SC31-period-growth/, with README, period_growth_check.py and its output. The check uses exact integers and a fixed seed, and runs under python3 -I; 10 controls pass.

Verification

  • An independent confirmation review at beb24b35 returned ACCEPT on every item (R1–R4, O1, O3, references, scope). Its one record fix, the control count 11 → 10, is 71c96578.
  • The release gate passes locally except lean-axioms, which needs lake and runs in CI.
  • The check script replays byte-identically. 112 citations, 0 broken.
  • The added-lines scan is clean.

Draft: merge only at an exact SHA the owner approves, by normal merge commit.


Generated by Claude Code

claude added 12 commits October 27, 2026 17:20
Main §2.3, continuous-time extension: P-indivisibility now follows from a
stated hypothesis, near-total return at a common time. That return is the
counterpart of Γ_L = I for a bijection of finite order. Poincaré recurrence
does not supply it, since a mixing flow has T_ii(t) → μ(cell) < 1, so the
general-flow case is open. Main :174 now says "finite-recurrence argument".

Main §2.3, fast-bath remark: the JC and Davies–Merkli examples lie outside
the finite-recurrence hypothesis, and (C2) is not necessary for
recurrence-cycle P-indivisibility. The §3.4 theorem bounds conditional
memory under the mixing hypothesis, not P-divisibility.

Main §4.4 and GR §6.3: no type II algebra, no entropy identification
(G_sub is undefined in the corpus), and no dS phase computation are
derived. Reproducing the cancellation is open. The HUZ dimension is a
finite partition count, and the AAIL scaling is not derived. The
evidential self-assessment is removed. The GR §6 heading is kept per the
documented decision at 9ff2771.

SM §7.5 gap (ii) Part A: uniqueness of the φ-invariant distribution needs
a single cycle, and P-indivisibility does not give it. ρ∘T = ρ is now
conditional on the cycle ergodicity of gap (i). The nonexistent "Main
Theorem 4" citation is dropped. Bridge (c) now says "a stationary
distribution".

Mirrors corrected: SM §8.5 and the Explainer FAQ (self-assessment), and
book ch01 §1.5, ch07 §7.7 and ch18 §18.7, each with its FULL.md copy.
Regenerated Main, GR, SM, Explainer and the book.

Checks: the release gate passes except lean-axioms, which has no lake
toolchain locally. edge_rigidity_probe passes. The added-lines register
scan has 0 hits.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Y87wExth9RoUb3dtbumhTb
…ecurrence terms

Owner decisions and the ACCEPT WITH CHANGES review of 42bc405.

- Main §4.4, GR §6.3, ch07 §7.7 (+FULL), R1: the finite-dimensional
  statement is scoped to each finite region. The quasilocal
  C*-completion (GR §3.3) is cited, with no state or representation
  selected. No von Neumann closure, relation to CLPW or entropy
  identification is derived. Whether the construction reproduces CLPW's
  algebra and its entropy is open.
- GR §6.3, R2: the horizon entropy is σ per boundary mode over the
  N_modes of §5. It recovers S_dS under the §3 calibration.
- SM §7.5 gap (ii), (6b) and R4: the whole gap is labelled conditional
  on cycle ergodicity. The φ-invariance of ρ∘T is unconditional. The
  form E(a,b) = a·a + b·b − a·Nb of the §4.2 rule is conserved and even
  under T, so its level sets are φ- and T-invariant. Both parts carry
  gap (i)'s residual. Dropped "does not bear on this".
- SM §4.2 :294, (6a): the diagnostics show chaos numerically, within the
  sizes, ensembles and protocols sampled. No single-cycle theorem is
  established. "chat-track" is removed there and at Structure :1115.
- Main :176: the theorem uses no form of (C2), and (C2-structural) holds
  by reversibility. Adds the range condition ε ≤ 1 − 1/n_V.
- Main :706: Slagle-Preskill comparison narrowed to the proved
  equivalence. The continuous-time law is additional structure, and
  operational QM needs the quantum-complete extension.
- ch18 §18.7 (+FULL): the route needs Γ_n = I. The SM §4.2 rule fixes
  the zero configuration, so no single cycle covers S. Exact
  finite-bijection recurrence is now named "finite recurrence" or "exact
  recurrence" at ch18 :174 and :193, ch09 :106 and ch02 :32.
- Record: corrected the G_sub reason, the survivor counts and the
  provenance of the heading decision.

Rebuilt Main, GR, SM, Structure and the book. Release gate: every step
passes except lean-axioms (no lake locally). edge_rigidity_probe passes.
The added-lines register scan and the secrets scan are clean.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Y87wExth9RoUb3dtbumhTb
Book ch18 §18.7 called lcm(1..|S|) "Landau's function" and gave N ~ e^{|S|}
for a "generic permutation". It then presented e^{e^{10^{122}}} as the
period, although that number is only an upper bound.

The period of an arbitrary bijection now has three separate quantities:
- every order divides lcm(1..n), with ln lcm = psi(n) ~ n and
  psi(n) < 1.03883 n (Rosser-Schoenfeld 1962);
- the maximum order is Landau's g(n), with ln g ~ sqrt(n ln n) (Landau 1903);
- the typical order of a uniform permutation follows Erdos-Turan: ln ord
  ~ (ln n)^2/2 in probability (1965), with a normal law of variance
  (ln n)^3/3 (1967). This applies only under a uniform model, and the
  corpus adopts no such model (ch03 §3.2).

The framework's linear rule (A5) has its own bound. An invertible linear
map of (Z/q)^D has order at most q^D - 1 = |S| - 1 for every q >= 2, by
Cayley-Hamilton. On a ring the wave rule's period is qL (Theorem B.3.1).
The framework bounds the 3D period but does not compute it.

ch01 §1.5 said "N can be as large as m!" and "t_R ~ e^{10^{122}} years".
It now gives the g(n) and lcm bounds and the linear-rule bound N < n. The
Explainer gets the same correction. "Infinite observation time" becomes
the finite bound.

Summaries now quote the linear-rule bound: ch18 :20, :28 and the closing
summary, App A F8, App C, and book/README. The bibliography adds Landau,
Erdos-Turan I and III, and Rosser-Schoenfeld.

Mirrors: ch01, ch18, App A, App C and the bibliography, each with its
FULL copy. Regenerated the Explainer and the book. The record is at
verification/audits/manuscript/intro-corpus-audit-20261026/tracks/SC31-period-growth/.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Y87wExth9RoUb3dtbumhTb
The SC-28 review amendment (df061d6) rewrites ch18 §18.7 :174, :180,
:191 and :193 and harmonizes ch02 :32 and ch09 :106. The Markdown sources
merged without conflict. Checked by merits: the merge's source diff
against df061d6 equals SC-31's own diff, and against 72c347b it equals
SC-28's diff. SC-28's sentences are kept as they stand.

The book .tex and .pdf were regenerated, not hand-merged. ch18 :20 now
says "exact recurrence", matching SC-28's terms. The SC-31 record is
updated with the post-merge re-grep and the owner decisions.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Y87wExth9RoUb3dtbumhTb
…e, integrability

- SM §7.5 gap (ii) Part A (Q1): dropped the E-level-set derivation. The
  integrable linear rule conserves a whole family of E_p, so its level
  sets are not single cycles. TφT = φ⁻¹ is now credited to the update
  form (a,b) ↦ (R(a) − b, a) with T(a,b) = (b,a), which holds for every
  R. T maps cycles to cycles, and ρ uniform on a cycle C has ρ∘T = ρ
  exactly when T(C) = C. Part A's label, the bold heading and the
  closing sentence now read "cycle ergodicity of the realized bijection
  on a T-invariant set carrying ρ".
- Main §4.4, GR §6.3, ch07 §7.7 (+FULL) (Q2): the disclaimer is scoped
  to "no identification of CLPW's entropy with a substratum quantity".
- SM §4.2 :294 (Q3): "Breaking the integrability of the linear rule is
  necessary for full-shell sampling; chaos does not establish
  full-shell sampling".
- Main :706 (optional): "exact finite operational quantum mechanics".
- Record rows updated to match.

Rebuilt Main, GR, SM and the book. Release gate: every step passes
except lean-axioms (no lake locally). edge_rigidity_probe passes. The
register, secrets and model-id scans are clean.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Y87wExth9RoUb3dtbumhTb
The SC-28 confirmation-review fixes (c43347f) touch SM :294 and :1211,
Main :706, GR :368 and ch07 :199 with its FULL copy. None of these are
SC-31 lines. The sources merged without conflict. Checked by merits:
SC-31's source diff against c43347f is unchanged from its diff against
df061d6, and the SC-28 delta is carried exactly. The book .tex and .pdf
were regenerated, not hand-merged. Content is unchanged.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Y87wExth9RoUb3dtbumhTb
…requirement

Two phrases in the :294 paragraph still made chaos the requirement for
full-shell sampling, against the sentence below them. Way out (i) now
reads "breaking the linear rule's integrability, which full-shell
sampling needs". The closing sentence now reads that the chaos "shows
that the rounding breaks the linear rule's integrability as the
ergodicity interpretation requires". Rebuilt SM. Release gate: every
step passes except lean-axioms (no lake locally). The register and
secrets scans are clean.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Y87wExth9RoUb3dtbumhTb
51ba665 is a single-parent child of c43347f. It changes only SM :294
and the regenerated SM.tex and SM.pdf. The merge had no conflicts, so
nothing was regenerated. Checked by merits: the merge delta against
7114aa2 is exactly SC-28's SM change, and SC-31's source diff against
51ba665 is unchanged. Content is unchanged.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Y87wExth9RoUb3dtbumhTb
…#946)

R1. e^{10^122} is no longer used as a bound on |S|. The corpus bounds
only |C_V x C_B| (Substratum §4), treats |C_D| as gauge, and puts S's
information above the Bekenstein-Hawking bound. Bounds are now stated in
terms of |S|, and the ch18 numbers are marked as an illustration,
conditional on |S| ~ e^{10^122}.

R2. Falsifiability is stated for a substratum of given |S| and phi.
Non-recurrence within g(|S|) steps contradicts a finite bijection, and
within |S| - 1 steps only A5. Since |S| is not fixed, no finite
observation falsifies the framework as a whole, and records return with
S.

R3. The summaries (ch18 :20, :28 and the close, App A F8, App C,
book/README and the Explainer) quote the bijection-level bound g(|S|).
"< |S|" is scoped to the exactly linear fixed-graph rule. It does not
cover the state-dependent-geometry map (SM §3.1) or the rounded bijection
(SM §4.2).

R4. App B :420 now says omega "can be" astronomically large.

O1. ch18 states that the framework supplies no lower bound on N.

The Rosser-Schoenfeld constant and its citation are dropped from the
manuscript, the bibliography and the record. The check script has 11
controls, all passing. Regenerated the book and the Explainer.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Y87wExth9RoUb3dtbumhTb
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Y87wExth9RoUb3dtbumhTb
…haos (SM :294) (#946)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Y87wExth9RoUb3dtbumhTb
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Y87wExth9RoUb3dtbumhTb

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Closing without merge: fully absorbed into main. The owner approved this closure in the Workstream D survival audit, checked against main c596904a.

All 6 SC-31 corrections, plus the SC-28 hunks inherited from #962, are on main:

  • Timescale lemma: ch01:121 / FULL:465.
  • Period bounds: ch18:184–196.
  • F8: appendix-a:181.
  • Summaries: ch18:20/28/336, README:90, appendix-c:132.
  • "can be": appendix-b:420; Explainer:175.

The Erdős–Turán entries are obsolete: #1005 removed the typical-order clause and both references. The branch and history are kept.


Generated by Claude Code

@amaybaum amaybaum closed this Oct 31, 2026
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