Theorem elissetOLD

Description: Obsolete version of elisset as of 28-Aug-2023. An element of a class exists. (Contributed by NM, 1-May-1995) (New usage is discouraged.) (Proof modification is discouraged.)

	Ref	Expression
Assertion	elissetOLD	$$⊢A\in V\to \exists xx=A$$

Proof

Step	Hyp	Ref	Expression
1		elex	$$⊢A\in V\to A\in \mathrm{V}$$
2		isset	$$⊢A\in \mathrm{V}\leftrightarrow \exists xx=A$$
3	1 2	sylib	$$⊢A\in V\to \exists xx=A$$