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Metamath Proof Explorer

Theorem ssv

Description: Any class is a subclass of the universal class. (Contributed by NM, 31-Oct-1995)

		Ref	Expression
	Assertion	ssv	$⊢ A \subseteq V$

Step	Hyp	Ref	Expression
1		elex	$⊢ x \in A \to x \in V$
2	1	ssriv	$⊢ A \subseteq V$