Theorem exim 1834

Description: Theorem 19.22 of [Margaris] p. 90. (Contributed by NM, 10-Jan-1993.) (Proof shortened by Wolf Lammen, 4-Jul-2014.)

Assertion

Ref	Expression
exim	⊢ (∀𝑥(𝜑 → 𝜓) → (∃𝑥𝜑 → ∃𝑥𝜓))

Proof of Theorem exim

Step	Hyp	Ref	Expression
1		id 22	. 2 ⊢ ((𝜑 → 𝜓) → (𝜑 → 𝜓))
2	1	aleximi 1832	1 ⊢ (∀𝑥(𝜑 → 𝜓) → (∃𝑥𝜑 → ∃𝑥𝜓))

Syntax hints:   → wi 4  ∀wal 1538  ∃wex 1779

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809

This theorem depends on definitions:  df-bi 207  df-ex 1780

This theorem is referenced by:  eximi  1835  19.38b  1841  19.23v  1942  alequexv  2001  nf5-1  2146  spimt  2384  darii  2658  festino  2667  baroco  2669  darapti  2677  elex22  3463  spcimgfi1OLD  3505  vtoclegftOLD  3546  sbccomlem  3823  rspn0  4309  exel  5380  bj-axdd2  36568  bj-2exim  36587  bj-sylget  36597  bj-alexim  36603  bj-cbvalimt  36615  bj-cbveximt  36616  bj-eqs  36651  bj-nnf-exlim  36732  bj-nnflemee  36739  bj-nnflemae  36740  bj-axc10  36759  bj-alequex  36760  bj-spimtv  36770  bj-spcimdv  36871  bj-spcimdvv  36872  sn-exelALT  42194  2exim  44355  pm11.71  44373  onfrALTlem2  44523  19.41rg  44527  ax6e2nd  44535  elex2VD  44814  elex22VD  44815  onfrALTlem2VD  44865  19.41rgVD  44878  ax6e2eqVD  44883  ax6e2ndVD  44884  ax6e2ndeqVD  44885  ax6e2ndALT  44906  ax6e2ndeqALT  44907