Theorem 1oelpr

Description: 1o is an element of { (/) , 1o } . (Contributed by Umit Teoman Dogan, 10-Jun-2026)

	Ref	Expression
Assertion	1oelpr	⊢ 1o ∈ { ∅ , 1o }

Proof

Step	Hyp	Ref	Expression
1		1oex	⊢ 1o ∈ V
2	1	prid2	⊢ 1o ∈ { ∅ , 1o }