Corpus formal_theorem canonical 2026-05-27T20:53:50+00:00
Corpus v3 · Formal theorem cid005270FTH0007canonicalv1

crossing_iff_real (theorem)

/-- [I.D39] Crossing characterization: a split-complex element z is at the crossing iff z is real (im = 0). Proof: b_sector = c_sector iff re+im = re-im iff im = 0. -/

Formalization

lean_axiom_freesorries: 0project axioms: 0
  • ModuleTauLib.BookI.Boundary.Fourier
  • Declarationcrossing_iff_real
  • Lean toolchainleanprover/lean4:v4.x.x

Identifiers

  • Corpus ID cid005270
  • Primary alias FTH0007
  • Type Formal theorem
  • Status canonical
  • Visibility public
  • Version v1

Aliases & legacy IDs

crossing_iff_realcrossing-iff-realTauLib.BookI.Boundary.Fourier::crossing_iff_real

Release lines

corpus_v2corpus_v3_working

Version & History

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

Status disclaimer

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