Corpus v3 · Formal theorem
cid005862
FTH0597canonicalv1ladder_has_four_levels (theorem)
/-- [III.T04] Structural uniqueness: three applications of succ from any starting level reach E₃. The ladder has exactly 4 levels. -/
Formalization
lean_axiom_freesorries: 0project axioms: 0
Identifiers
Aliases & legacy IDs
ladder_has_four_levelsladder-has-four-levelsTauLib.BookIII.Enrichment.CanonicalLadder::ladder_has_four_levelsRelease lines
corpus_v2corpus_v3_workingVersion & History
Status disclaimer
A Corpus Item page reports the program's current internal record for this item. It does not imply external verification, scientific consensus, or final proof unless explicitly stated. Read it together with its dependencies, formalization status, and the program's overall stance.