Corpus v3 · Formal theorem
cid005348
FTH0086canonicalv1nat_not_internal_set (theorem)
/-- [I.R28] Combined "no internal copy" result: for nonzero n, no Set(α_n) captures all of ℕ⁺, and Set(ω) strictly exceeds O_α. This expresses the inseparability of ℕ and ω: O_α ≅ ℕ⁺ is NOT a valid τ-internal set. The closest is Set(ω) = O_α ∪ {ω}. -/
Formalization
lean_axiom_freesorries: 0project axioms: 0
Identifiers
Aliases & legacy IDs
nat_not_internal_setnat-not-internal-setTauLib.BookI.Sets.OrbitSets::nat_not_internal_setRelease lines
corpus_v2corpus_v3_workingVersion & History
Status disclaimer
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