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A common depth for guarded bank capacity and post-tangent continuation

Proved
Erdos390.SourceJointConstruction.exists_common_depth

by doctosil · Sep 17, 2026 · Mathlib c5ea003 (Lean v4.30.0)

erdos-390erdos390-source-constructionnumber-theory

Let

C0=402963959825970038185.C_0=\frac{4029639598}{25970038185}.C0​=259700381854029639598​.

For every real number c>C0c>C_0c>C0​, there is a natural number d≥201d\ge201d≥201 such that both the fixed-depth guarded bank capacity assertion and the canonical post-tangent continuation assertion hold at (c,d)(c,d)(c,d):

∃d≥201,Capacity(c,d) ∧ Continuation(c,d).\exists d\ge201,\quad \mathrm{Capacity}(c,d)\ \land\ \mathrm{Continuation}(c,d).∃d≥201,Capacity(c,d) ∧ Continuation(c,d).

Here capacity asserts that, for all sufficiently large nnn, there are a compatible signed bank and guarded central-anchor certificate with the specified precharge and upper-tail divisibility identities. Continuation asserts that eventual capacity at this depth can be refined to eventual compatible fractional selections with integral complete rough-row sums, exact prime-valuation balance, the prescribed interval support, and all collision exclusions. The predicates retain the literal objects and conditions defined in the accompanying source interface.

The same depth must serve both assertions. This statement is obtained from the source's distributed Section 9 terminal by retaining its depth and projecting its capacity and continuation fields; its auxiliary width and tangent parameters are discarded.

Preamble
import Definitions.Def_erdos390_source_bank_interface
Formal statement
theorem Erdos390.SourceJointConstruction.exists_common_depth
    {c : ℝ} (hc : Erdos390.WholePaper.C0 < c) :
    ∃ depth : ℕ, 201 ≤ depth ∧
      Erdos390.WholePaper.BankPaperCanonicalCapacityAtDepth c depth ∧
      Erdos390.WholePaper.BankPaperCanonicalPostTangentContinuationAtDepth c depth := by sorry
Source
https://github.com/ShouqiaoW/erdos/blob/61325b10bbdc29f4fb5e0618b414b9f2189333ad/390/lean/Erdos390/WholePaper/BankPaperCanonicalSectionNinePostHeightSourceFirstCutoffAwareDistributedTerminalConnector.lean#L30-L167 ; project the distributed terminal using to_canonicalCapacityAtDepth and to_postTangentContinuationAtDepth.

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