Theorem bj-vtoclg1f

Description: Reprove vtoclg1f from bj-vtoclg1f1 . This removes dependency on ax-ext , df-cleq and df-v . Use bj-vtoclg1fv instead when sufficient (in particular when V is substituted for _V ). (Contributed by BJ, 14-Sep-2019) (Proof modification is discouraged.)

	Ref	Expression
Hypotheses	bj-vtoclg1f.nf	$$⊢Ⅎx\psi$$
	bj-vtoclg1f.maj	$$⊢x=A\to \left(\phi \to \psi \right)$$
	bj-vtoclg1f.min	$$⊢\phi$$
Assertion	bj-vtoclg1f	$$⊢A\in V\to \psi$$

Proof

Step	Hyp	Ref	Expression
1		bj-vtoclg1f.nf	$$⊢Ⅎx\psi$$
2		bj-vtoclg1f.maj	$$⊢x=A\to \left(\phi \to \psi \right)$$
3		bj-vtoclg1f.min	$$⊢\phi$$
4		elisset	$$⊢A\in V\to \exists xx=A$$
5	1 2 3	bj-exlimmpi	$$⊢\exists xx=A\to \psi$$
6	4 5	syl	$$⊢A\in V\to \psi$$