Corpus definition canonical 2026-05-27T20:53:50+00:00
Corpus v3 · Definition cid001448DEF0218canonicalv1

Hardy-Littlewood Constant

Hardy-Littlewood twin constant C₂(k) = ∏ p(p-2)/(p-1)² for p≥3. C₂(2)=3/4, C₂(3)=45/64. Decreasing toward C₂≈1.3203.

Payload

Hardy-Littlewood Constant

Hardy-Littlewood twin constant C₂(k) = ∏ p(p-2)/(p-1)² for p≥3. C₂(2)=3/4, C₂(3)=45/64. Decreasing toward C₂≈1.3203.

Hardy-Littlewood Constant

Summary

Hardy-Littlewood twin constant C₂(k) = ∏ p(p-2)/(p-1)² for p≥3. C₂(2)=3/4, C₂(3)=45/64. Decreasing toward C₂≈1.3203.

Statement

\label{def:hl-constant}
The twin prime constant truncated at depth~$k$:
\[
C_2(k) = \prod_{\substack{i=2 \\ p_i \ge 3}}^{k}
\frac{p_i(p_i - 2)}{(p_i - 1)^2}.
\]
Computed as a rational (numerator, denominator).
$C_2(2) = 3/4$, $C_2(3) = 45/64$.

\textbf{Lean:} \texttt{hl\_twin\_constant\_approx}.\quad
\textbf{Registry:} III.D106.

Proof / Justification

This item is definitional. No manuscript proof is required.

Source Context

  • Registry source: book-03.jsonl line 267
  • Manuscript source: 2nd-edition/book-iii-categorical-spectrum/02_mainmatter/part10/ch81-additive-conjectures-deep.tex lines 255-266

Lean / Formalization Notes

  • Formalization: formalized
  • Module: TauLib.BookIII.Spectral.TwinPrimeDeep
  • Name: hl_twin_constant_approx

Dependencies

  • Canonical: (none)

Generated by later projection phases.

Generated by later projection phases.

Revision Notes

  • 2026-04-24: Initial pilot migration.

Identifiers

  • Corpus ID cid001448
  • Primary alias DEF0218
  • Type Definition
  • Status canonical
  • Visibility public
  • Version v1

Aliases & legacy IDs

III.D106hardy-littlewood-constantdef:hl-constant

Release lines

corpus_v3_workingcorpus_v2

Relations

Formalized by (1)

Appears in (1)

Downstream uses (computed) (2)

Items in the corpus that reference this one via load-bearing relations. Computed from the full corpus-v3 graph at build time.

Sources

  • Monograph cid000024Book III, Part 10, Chapter 81 (Wave R1)

Version & History

  • v1 · 2026-05-10 imported from v2 registry
  • v1 · 2026-05-10 wired formalized by in wave 5

Status disclaimer

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