Corpus formal_theorem canonical 2026-05-27T20:53:50+00:00
Corpus v3 · Formal theorem cid005310FTH0048canonicalv1

euler_sieve_cross (theorem)

/-- [I.P44] The Euler sieve identity in cross-multiplied Nat form: (2/3) · (4/5) · (121/120) = 121/225 Cross-multiplied: 2 · 4 · 121 · 225 = 3 · 5 · 120 · 121. -/

Formalization

lean_axiom_freesorries: 0project axioms: 0
  • ModuleTauLib.BookI.Kernel.ActionQuantum
  • Declarationeuler_sieve_cross
  • Lean toolchainleanprover/lean4:v4.x.x

Identifiers

  • Corpus ID cid005310
  • Primary alias FTH0048
  • Type Formal theorem
  • Status canonical
  • Visibility public
  • Version v1

Aliases & legacy IDs

euler_sieve_crosseuler-sieve-crossTauLib.BookI.Kernel.ActionQuantum::euler_sieve_cross

Release lines

corpus_v2corpus_v3_working

Version & History

  • v1 · 2026-05-10 imported from v2 taulib declarations

Status disclaimer

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