Theorem limord 4255

Description: A limit ordinal is ordinal. (Contributed by NM, 4-May-1995.)

Assertion

Ref	Expression
limord	⊢ (Lim 𝐴 → Ord 𝐴)

Proof of Theorem limord

Step	Hyp	Ref	Expression
1		dflim2 4230	. 2 ⊢ (Lim 𝐴 ↔ (Ord 𝐴 ∧ ∅ ∈ 𝐴 ∧ 𝐴 = ∪ 𝐴))
2	1	simp1bi 964	1 ⊢ (Lim 𝐴 → Ord 𝐴)

Syntax hints:   → wi 4   = wceq 1299   ∈ wcel 1448  ∅c0 3310  ∪ cuni 3683  Ord word 4222  Lim wlim 4224

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 105

This theorem depends on definitions:  df-bi 116  df-3an 932  df-ilim 4229

This theorem is referenced by:  limelon  4259  nlimsucg  4419