Theorem bj-hbex

Description: A more general instance of hbex . (Contributed by BJ, 4-Apr-2026)

	Ref	Expression
Hypothesis	bj-hbex.1	|- ( ph -> A. x ps )
Assertion	bj-hbex	|- ( E. y ph -> A. x E. y ps )

Proof

Step	Hyp	Ref	Expression
1		bj-hbex.1	|- ( ph -> A. x ps )
2		19.12	|- ( E. y A. x ps -> A. x E. y ps )
3	2 1	bj-sylge	|- ( E. y ph -> A. x E. y ps )