`ComparatorChallenges/ForcedNavierStokesComputation.lean`

Explanation legend Lean4 Domain Explanation Language (L4DEL)

L4DEL explanations are a separate layer. They do not change the Lean source. Intuition is explanatory prose; numbered items are a reading path; sources link the wording back to evidence.

L4DEL: Lean4 Domain Explanation Language

Annotation provenance. This overlay contains 120 curated AI-written annotations and 1273 mechanical source-derived annotations. They have not been human-reviewed as explanations; treat them as unverified and not mathematical authority. Retained generation history: The 9 original curated annotations were produced in a Claude Sonnet 5.5 session at medium effort; Claude Opus 5.5 is recorded in that session as the advisor model, not the direct author. Those 9 annotations were revised on 2026-10-14 to bind all of them to exact page-one quotations from 6 pinned OpenAI manuscripts, the matching pinned formalization notes, and named historical primary sources; no human review is claimed, and the exact runtime model identifier was not exposed to the artifact generator. The 3 manuscript-grounded matrix-multiplication annotations were composed from pinned OpenAI manuscripts and named historical sources in a Codex session on 2026-10-14; no human review is claimed, and the exact runtime model identifier was not exposed to the artifact generator. Six additional target-specific annotations for Catalan's constant, the irrationality exponent of pi, dyadic Erdos similarity, Unique Games, quintic Lienard systems, and Yau nodal growth were composed from pinned OpenAI manuscripts, exact page-one quotations, exact Lean statements, and named historical sources in a Codex session on 2026-10-14; no human review is claimed, and the exact runtime model identifier was not exposed to the artifact generator. Four additional target-specific annotations for Seymour's second-neighborhood conjecture, Cannon's conjecture, Koebe circle-domain uniformization, and circle-domain rigidity were composed from 4 pinned OpenAI manuscripts, exact page-one quotations, exact Lean statements, and named historical primary sources in a Codex session on 2026-10-14; no human review is claimed, and the exact runtime model identifier was not exposed to the artifact generator. Four additional target-specific annotations for simple Lebesgue spectrum on the three-torus, Rokhlin multiple mixing, the nine-dimensional Borsuk counterexample, and Tingley's sphere-isometry problem were composed from 4 pinned OpenAI manuscripts, exact page-one quotations, exact Lean statements, and named historical primary sources in a Codex session on 2026-10-14; no human review is claimed, and the exact runtime model identifier was not exposed to the artifact generator. Four additional target-specific annotations for the Abhyankar-Sathaye counterexample, the circulant Hadamard conjecture, the Eilenberg-Ganea counterexample, and short Egyptian fractions were composed from 4 pinned OpenAI manuscripts, exact page-one quotations, exact Lean statements, and quotations from Sathaye, Turyn with Storer, Eilenberg with Ganea, and Erdos in a Codex session on 2026-10-14; no human review is claimed, and the exact runtime model identifier was not exposed to the artifact generator. Four additional target-specific annotations for the complete Crouzeix inequality, unrestricted Euclidean five-coloring, the general Mahler conjecture, and Thompson F nonamenability were composed on 2026-10-14 from exact Lean statements, 4 pinned OpenAI manuscripts, the matching formalization notes, and linked historical sources by Crouzeix, de Grey, Mahler, Cannon, Floyd, and Parry; no human review is claimed. Four additional target-specific annotations for algorithmic strong thin trees, Barnette's Hamiltonian-cycle conjecture, the explicit Artin CAT(0) counterexample, and generalized amplitude-damping capacity were composed on 2026-10-14 from exact Lean statements, 4 pinned OpenAI manuscripts, matching formalization notes, and linked historical sources by Anari with Goddyn, Arts with Hopman and Timmermans, Charney, and Khatri with Sharma and Wilde; no human review is claimed. Fourteen solution-level annotations for Seymour's second-neighborhood theorem were added on 2026-10-14 from the pinned 15-page manuscript, covering the exact-neighborhood model, minimal-counterexample reduction, subset deficit, transitive blowup, pruning, extremal contradiction, and proof-bearing final theorem. The subset and blowup annotations also bind exact quotations from Tyler Seacrest (2019) and Brantner, Brockman, Kay, and Snively (2009); no human review is claimed. Thirty-seven declaration-level annotations were added on 2026-10-14 for the rest of ComparatorChallenges/AlgorithmicThinTrees.lean, covering its multigraph semantics, stack-machine cost model, explicit and binary-multiplicity encodings, output certificate, and complete algorithmic proposition. They are bound to the pinned OpenAI manuscript and linked earlier thin-tree sources by Luis Goddyn, Nima Anari, and Shayan Oveis Gharan; the annotation explicitly preserves that the concluding comparator theorem still has body by sorry, and no human review is claimed. Thirty-one supporting declarations in ComparatorChallenges/UniqueGamesTheorem.lean were upgraded or added on 2026-10-14, completing curated coverage of all thirty-two declarations in that file. The annotations cover the finite game model, Boolean formula and parser, binary-vector translations, explicit output serialization, finite-alphabet machine contract, and gap theorem; they distinguish manuscript-backed mathematics from Lean-specific canonical parsing and unary game output encoding, bind exact OpenAI manuscript quotations, and credit Subhash Khot through his 2010 survey. The comparator theorem remains explicitly labeled as having body by sorry; no human review is claimed. The source-derived generator was hardened on 2026-10-14 so a formalization note covering multiple comparator results no longer copies its combined Scope prose onto each declaration; those targets now use declaration-specific source comments when available and otherwise remain explicitly bounded to the exact Lean statement. The remaining source-derived annotations were generated mechanically from pinned formalization notes and source comments by tooling developed in a GPT-5.6 Sol session at ultra reasoning; GPT-5.6 Sol did not originate the source prose.

Credit: OpenAI's pinned repository says an unreleased internal model produced the manuscripts and supporting proof artifacts. The collection builds on the mathematics community's accumulated problems, results, language, and formal libraries; each manuscript's BibTeX and bibliography are the authority for individual scholarly credit.

Project sources: Pinned openai/math documentation, Pinned formalization catalogue

51 declarations, 1 contain sorry, 0 declared as axioms

A single main result: effective forced Navier–Stokes computation detected by a fixed particle entering a fixed open box, exactly when the encoded machine halts.

inductive OAI.BalancedTransport.Recorder.Direction line 8
Also declared: ComparatorChallenges/BalancedThreeStack.lean:7 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:8 (same declaration text).
structure OAI.BalancedTransport.Recorder.Transition line 12
Also declared: ComparatorChallenges/BalancedThreeStack.lean:14 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:15 (same declaration text).
structure OAI.BalancedTransport.FiniteMachine line 18
Also declared: ComparatorChallenges/BalancedThreeStack.lean:20 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:26 (same declaration text).
abbrev OAI.BalancedTransport.Input line 26
Also declared: ComparatorChallenges/BalancedThreeStack.lean:28 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:34 (same declaration text).
structure OAI.BalancedTransport.TapeConfiguration line 28
Also declared: ComparatorChallenges/BalancedThreeStack.lean:30 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:36 (same declaration text).
def OAI.BalancedTransport.initialConfiguration line 33
Also declared: ComparatorChallenges/BalancedThreeStack.lean:35 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:41 (same declaration text).
def OAI.BalancedTransport.machineStep line 36
Also declared: ComparatorChallenges/BalancedThreeStack.lean:38 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:44 (same declaration text).
def OAI.BalancedTransport.Halts line 41
Also declared: ComparatorChallenges/BalancedThreeStack.lean:43 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:49 (same declaration text).
def OAI.BalancedTransport.Recorder.Direction.number line 45
Also declared: ComparatorChallenges/BalancedThreeStack.lean:47 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:53 (same declaration text).
def OAI.BalancedTransport.FiniteMachine.code line 50
Also declared: ComparatorChallenges/BalancedThreeStack.lean:52 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:58 (same declaration text).
def OAI.BalancedTransport.inputCode line 56
Also declared: ComparatorChallenges/BalancedThreeStack.lean:58 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:64 (same declaration text).
abbrev OAI.BalancedTransport.Space line 59
Also declared: ComparatorChallenges/BalancedThreeStack.lean:61 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:67 (same declaration text).
abbrev OAI.BalancedTransport.Field line 60
Also declared: ComparatorChallenges/BalancedThreeStack.lean:62 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:69 (same declaration text).
abbrev OAI.BalancedTransport.Velocity line 61
Also declared: ComparatorChallenges/BalancedThreeStack.lean:63 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:71 (same declaration text).
abbrev OAI.BalancedTransport.Pressure line 62
Also declared: ComparatorChallenges/BalancedThreeStack.lean:64 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:73 (same declaration text).
abbrev OAI.BalancedTransport.Family line 63
Also declared: ComparatorChallenges/BalancedThreeStack.lean:65 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:75 (same declaration text).
abbrev OAI.BalancedTransport.MaterialFlow line 64
Also declared: ComparatorChallenges/BalancedThreeStack.lean:66 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:77 (same declaration text).
abbrev OAI.BalancedTransport.MultiIndex line 65
Also declared: ComparatorChallenges/BalancedThreeStack.lean:67 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:79 (same declaration text).
abbrev OAI.BalancedTransport.RationalPoint line 66
Also declared: ComparatorChallenges/BalancedThreeStack.lean:68 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:81 (same declaration text).
def OAI.BalancedTransport.timeD line 75
Also declared: ComparatorChallenges/BalancedThreeStack.lean:77 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:92 (same declaration text).
def OAI.BalancedTransport.spaceD line 78
Also declared: ComparatorChallenges/BalancedThreeStack.lean:80 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:95 (same declaration text).
def OAI.BalancedTransport.mixedD line 81
Also declared: ComparatorChallenges/BalancedThreeStack.lean:83 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:98 (same declaration text).
def OAI.BalancedTransport.spatialD line 86
Also declared: ComparatorChallenges/BalancedThreeStack.lean:88 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:103 (same declaration text).
def OAI.BalancedTransport.Smooth line 90
Also declared: ComparatorChallenges/BalancedThreeStack.lean:92 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:107 (same declaration text).
def OAI.BalancedTransport.BoundedMixed line 93
Also declared: ComparatorChallenges/BalancedThreeStack.lean:95 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:110 (same declaration text).
def OAI.BalancedTransport.CH line 96
Also declared: ComparatorChallenges/BalancedThreeStack.lean:98 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:113 (same declaration text).
def OAI.BalancedTransport.C1L2 line 102
Also declared: ComparatorChallenges/BalancedThreeStack.lean:104 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:119 (same declaration text).
def OAI.BalancedTransport.div line 110
Also declared: ComparatorChallenges/BalancedThreeStack.lean:112 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:127 (same declaration text).
def OAI.BalancedTransport.laplacian line 113
Also declared: ComparatorChallenges/BalancedThreeStack.lean:115 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:130 (same declaration text).
def OAI.BalancedTransport.convection line 116
Also declared: ComparatorChallenges/BalancedThreeStack.lean:118 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:133 (same declaration text).
def OAI.BalancedTransport.gradient line 119
Also declared: ComparatorChallenges/BalancedThreeStack.lean:121 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:136 (same declaration text).
def OAI.BalancedTransport.affineForce line 122
Also declared: ComparatorChallenges/BalancedThreeStack.lean:124 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:139 (same declaration text).
def OAI.BalancedTransport.inertialCoefficient line 125
Also declared: ComparatorChallenges/BalancedThreeStack.lean:127 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:142 (same declaration text).
def OAI.BalancedTransport.viscousCoefficient line 128
Also declared: ComparatorChallenges/BalancedThreeStack.lean:130 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:145 (same declaration text).
def OAI.BalancedTransport.ZeroDataSolution line 131
Also declared: ComparatorChallenges/BalancedThreeStack.lean:133 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:148 (same declaration text).
def OAI.BalancedTransport.BoundedOnFiniteSlabs line 139
Also declared: ComparatorChallenges/BalancedThreeStack.lean:141 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:156 (same declaration text).
def OAI.BalancedTransport.ComparisonClass line 144
Also declared: ComparatorChallenges/BalancedThreeStack.lean:146 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:161 (same declaration text).
def OAI.BalancedTransport.UniqueInComparison line 148
Also declared: ComparatorChallenges/BalancedThreeStack.lean:150 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:165 (same declaration text).
def OAI.BalancedTransport.CommonCompactSupport line 153
Also declared: ComparatorChallenges/BalancedThreeStack.lean:155 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:170 (same declaration text).
def OAI.BalancedTransport.PeriodicAfterOne line 157
Also declared: ComparatorChallenges/BalancedThreeStack.lean:159 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:174 (same declaration text).
def OAI.BalancedTransport.IsMaterialFlow line 160
Also declared: ComparatorChallenges/BalancedThreeStack.lean:162 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:177 (same declaration text).
def OAI.BalancedTransport.fixedLabel line 164
Also declared: ComparatorChallenges/BalancedThreeStack.lean:166 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:181 (same declaration text).
def OAI.BalancedTransport.observer line 166
Also declared: ComparatorChallenges/BalancedThreeStack.lean:168 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:183 (same declaration text).
def OAI.BalancedTransport.rationalSpace line 169
Also declared: ComparatorChallenges/BalancedThreeStack.lean:171 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:186 (same declaration text).
def OAI.BalancedTransport.error line 171
Also declared: ComparatorChallenges/BalancedThreeStack.lean:173 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:188 (same declaration text).
def OAI.BalancedTransport.EffectiveFamily line 173
Also declared: ComparatorChallenges/BalancedThreeStack.lean:175 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:190 (same declaration text).
def OAI.BalancedTransport.EffectiveFieldIn line 186
Also declared: ComparatorChallenges/BalancedThreeStack.lean:188 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:203 (same declaration text).
def OAI.BalancedTransport.RealName line 195
Also declared: ComparatorChallenges/BalancedThreeStack.lean:197 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:212 (same declaration text).
def OAI.BalancedTransport.ComputableReal line 198
Also declared: ComparatorChallenges/BalancedThreeStack.lean:200 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:215 (same declaration text).
def OAI.BalancedTransport.nameOracle line 201
Also declared: ComparatorChallenges/BalancedThreeStack.lean:203 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/Model.lean:218 (same declaration text).
theorem OAI.BalancedTransport.balanced_three_stack_realization Challenge statement: Finite computation in a balanced zero-data fluid flow sorry line 206
L4DEL explanation
This declaration is an exact comparator-selected statement. Read the Lean statement below for its mathematical content.
1. The linked formalization note covers 6 distinct comparator results, so its combined Scope prose is not copied onto this declaration.
2. The repository's comparator configuration selects OAI.MathematicalPhysics.NavierStokes.BalancedTransport.MainResult as the released solution module checked against this declaration.
Sources and attribution: Pinned Lean source (fd4aeeb2ee4f)
Distinct definitions of this name: ComparatorChallenges/BalancedThreeStack.lean:211 (same declaration text), OAI/MathematicalPhysics/NavierStokes/BalancedTransport/MainResult.lean:12 (same statement text; different proof or body). Qualify references as OAI.BalancedTransport.balanced_three_stack_realization@path.
```
theorem balanced_three_stack_realization :
    ∃ U f₀ f₁ : Family Velocity,
    ∃ X : Family MaterialFlow,
    ∃ repeated : FiniteMachine → Velocity,
      EffectiveFamily U ∧ EffectiveFamily f₀ ∧ EffectiveFamily f₁ ∧
      (∀ M, Function.Periodic (repeated M) 1) ∧
      ∀ (M : FiniteMachine) (w : Input M),
        Smooth (U M w) ∧ Smooth (f₀ M w) ∧ Smooth (f₁ M w) ∧
        f₀ M w = inertialCoefficient (U M w) ∧
        f₁ M w = viscousCoefficient (U M w) ∧
        CommonCompactSupport (U M w) (f₀ M w) (f₁ M w) ∧
        BoundedMixed (U M w) ∧
…
```
Mentions: OAI.BalancedTransport.Family, OAI.BalancedTransport.Velocity, OAI.BalancedTransport.MaterialFlow, OAI.BalancedTransport.FiniteMachine, OAI.BalancedTransport.EffectiveFamily, OAI.BalancedTransport.Input, OAI.BalancedTransport.Smooth, OAI.BalancedTransport.inertialCoefficient, OAI.BalancedTransport.viscousCoefficient, OAI.BalancedTransport.CommonCompactSupport, OAI.BalancedTransport.BoundedMixed