Theorem exlimd 1621

Description: Deduction from Theorem 19.9 of [Margaris] p. 89. (Contributed by Mario Carneiro, 24-Sep-2016.) (Proof rewritten by Jim Kingdon, 18-Jun-2018.)

Hypotheses

Ref	Expression
exlimd.1	|- F/ x ph
exlimd.2	|- F/ x ch
exlimd.3	|- ( ph -> ( ps -> ch ) )

Assertion

Ref	Expression
exlimd	|- ( ph -> ( E. x ps -> ch ) )

Proof of Theorem exlimd

Step	Hyp	Ref	Expression
1		exlimd.1	. . 3 |- F/ x ph
2	1	nfri 1543	. 2 |- ( ph -> A. x ph )
3		exlimd.2	. . 3 |- F/ x ch
4	3	nfri 1543	. 2 |- ( ch -> A. x ch )
5		exlimd.3	. 2 |- ( ph -> ( ps -> ch ) )
6	2, 4, 5	exlimdh 1620	1 |- ( ph -> ( E. x ps -> ch ) )

Syntax hints:   -> wi 4   F/wnf 1484   E.wex 1516

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-5 1471  ax-gen 1473  ax-ie2 1518  ax-4 1534

This theorem depends on definitions:  df-bi 117  df-nf 1485

This theorem is referenced by:  exlimdd  1896  ceqsalg  2805  copsex2t  4307  alxfr  4526  mosubopt  4758  ovmpodf  6100  ovi3  6106  fsum2dlemstep  11860  fprod2dlemstep  12048  lss1d  14260  bj-exlimmp  15905