Theorem sn-base0

Description: Avoid axioms in base0 by using the discouraged df-base . This kind of axiom save is probably not worth it. (Contributed by SN, 16-Sep-2025) (Proof modification is discouraged.) (New usage is discouraged.)

	Ref	Expression
Assertion	sn-base0	⊢ ∅ = ( Base ‘ ∅ )

Proof

Step	Hyp	Ref	Expression
1		df-base	⊢ Base = Slot 1
2	1	str0	⊢ ∅ = ( Base ‘ ∅ )