Theorem 1iscard

Description: 1 is a cardinal number. (Contributed by RP, 1-Oct-2023)

	Ref	Expression
Assertion	1iscard	⊢ 1o ∈ ran card

Proof

Step	Hyp	Ref	Expression
1		omssrncard	⊢ ω ⊆ ran card
2		1onn	⊢ 1o ∈ ω
3	1 2	sselii	⊢ 1o ∈ ran card