Theorem bnj1198

Description: First-order logic and set theory. (Contributed by Jonathan Ben-Naim, 3-Jun-2011) (New usage is discouraged.)

	Ref	Expression
Hypotheses	bnj1198.1	$$⊢\phi \to \exists x\psi$$
	bnj1198.2	No typesetting found for |- ( ps' <-> ps ) with typecode |-
Assertion	bnj1198	Could not format assertion : No typesetting found for |- ( ph -> E. x ps' ) with typecode |-

Proof

Step	Hyp	Ref	Expression
1		bnj1198.1	$$⊢\phi \to \exists x\psi$$
2		bnj1198.2	Could not format ( ps' <-> ps ) : No typesetting found for |- ( ps' <-> ps ) with typecode |-
3	2	exbii	Could not format ( E. x ps' <-> E. x ps ) : No typesetting found for |- ( E. x ps' <-> E. x ps ) with typecode |-
4	1 3	sylibr	Could not format ( ph -> E. x ps' ) : No typesetting found for |- ( ph -> E. x ps' ) with typecode |-