Theorem r19.22sdv 1279

Description: Deduction from Theorem 19.22 of [Margaris] p. 90. (Restricted quantifier version with strong hypothesis.)

Hypothesis

Ref	Expression
r19.22sdv.1	|- (ph -> (ps -> ch))

Assertion

Ref	Expression
r19.22sdv	|- (ph -> (E.x e. A ps -> E.x e. A ch))

Distinct variable group(s):   ph,x

Proof of Theorem r19.22sdv

Step	Hyp	Ref	Expression
1		r19.22sdv.1	. . 3 |- (ph -> (ps -> ch))
2	1	a1d 14	. 2 |- (ph -> (x e. A -> (ps -> ch)))
3	2	r19.22dv 1278	1 |- (ph -> (E.x e. A ps -> E.x e. A ch))

Syntax hints:   -> wi 2   e. wcel 1092  E.wrex 1202

This theorem is referenced by:  iunpw 2040  fvelima 2859  ssfi 3430  isfinite2 3437  hlimcaui 5141  occllem6 5185  projlem25 5217  projlem31 5223  osumlem4 5533

This theorem was proved from axioms:  ax-1 3  ax-2 4  ax-3 5  ax-mp 6  ax-4 673  ax-5 674  ax-gen 677  ax-17 925

This theorem depends on definitions:  df-bi 128  df-an 198  df-ex 679  df-ral 1205  df-rex 1206

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