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Theorem r19.26 2677
Description: Theorem 19.26 of [Margaris] p. 90 with restricted quantifiers. (Contributed by NM, 28-Jan-1997.) (Proof shortened by Andrew Salmon, 30-May-2011.)
Assertion
Ref Expression
r19.26 (∀𝑥𝐴 (𝜑𝜓) ↔ (∀𝑥𝐴 𝜑 ∧ ∀𝑥𝐴 𝜓))

Proof of Theorem r19.26
StepHypRef Expression
1 simpl 109 . . . 4 ((𝜑𝜓) → 𝜑)
21ralimi 2613 . . 3 (∀𝑥𝐴 (𝜑𝜓) → ∀𝑥𝐴 𝜑)
3 simpr 110 . . . 4 ((𝜑𝜓) → 𝜓)
43ralimi 2613 . . 3 (∀𝑥𝐴 (𝜑𝜓) → ∀𝑥𝐴 𝜓)
52, 4jca 306 . 2 (∀𝑥𝐴 (𝜑𝜓) → (∀𝑥𝐴 𝜑 ∧ ∀𝑥𝐴 𝜓))
6 pm3.2 139 . . . 4 (𝜑 → (𝜓 → (𝜑𝜓)))
76ral2imi 2615 . . 3 (∀𝑥𝐴 𝜑 → (∀𝑥𝐴 𝜓 → ∀𝑥𝐴 (𝜑𝜓)))
87imp 124 . 2 ((∀𝑥𝐴 𝜑 ∧ ∀𝑥𝐴 𝜓) → ∀𝑥𝐴 (𝜑𝜓))
95, 8impbii 126 1 (∀𝑥𝐴 (𝜑𝜓) ↔ (∀𝑥𝐴 𝜑 ∧ ∀𝑥𝐴 𝜓))
Colors of variables: wff set class
Syntax hints:  wa 104  wb 105  wral 2528
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-5 1500  ax-gen 1502
This theorem depends on definitions:  df-bi 117  df-ral 2533
This theorem is referenced by:  r19.27v  2678  r19.28v  2679  r19.26-2  2680  r19.26-3  2681  ralbiim  2685  r19.27av  2686  reu8  3022  ssrab  3326  r19.28m  3614  r19.27m  3620  2ralunsn  3919  iuneq2  4023  cnvpom  5325  funco  5412  fncnv  5442  funimaexglem  5459  fnres  5495  fnopabg  5502  mpteqb  5790  eqfnfv3  5799  caoftrn  6325  iinerm  6871  ixpeq2  6984  ixpin  6995  rexanuz  11732  recvguniq  11739  cau3lem  11858  rexanre  11964  bezoutlemmo  12761  sqrt2irr  12918  pc11  13088  issubg3  13972  issubg4m  13973  ringsrg  14325  tgval2  15075  metequiv  15519  metequiv2  15520  mulcncflem  15631  2sqlem6  16153  vtxd0nedgbfi  16454  uspgr2wlkeq  16520  upgr2wlkdc  16532  bj-indind  16872
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