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Theorem r19.26 2657
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 2593 . . 3 (∀𝑥𝐴 (𝜑𝜓) → ∀𝑥𝐴 𝜑)
3 simpr 110 . . . 4 ((𝜑𝜓) → 𝜓)
43ralimi 2593 . . 3 (∀𝑥𝐴 (𝜑𝜓) → ∀𝑥𝐴 𝜓)
52, 4jca 306 . 2 (∀𝑥𝐴 (𝜑𝜓) → (∀𝑥𝐴 𝜑 ∧ ∀𝑥𝐴 𝜓))
6 pm3.2 139 . . . 4 (𝜑 → (𝜓 → (𝜑𝜓)))
76ral2imi 2595 . . 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 2508
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 1493  ax-gen 1495
This theorem depends on definitions:  df-bi 117  df-ral 2513
This theorem is referenced by:  r19.27v  2658  r19.28v  2659  r19.26-2  2660  r19.26-3  2661  ralbiim  2665  r19.27av  2666  reu8  3000  ssrab  3303  r19.28m  3582  r19.27m  3588  2ralunsn  3880  iuneq2  3984  cnvpom  5277  funco  5364  fncnv  5393  funimaexglem  5410  fnres  5446  fnopabg  5453  mpteqb  5733  eqfnfv3  5742  caoftrn  6263  iinerm  6771  ixpeq2  6876  ixpin  6887  rexanuz  11539  recvguniq  11546  cau3lem  11665  rexanre  11771  bezoutlemmo  12567  sqrt2irr  12724  pc11  12894  issubg3  13769  issubg4m  13770  ringsrg  14050  tgval2  14765  metequiv  15209  metequiv2  15210  mulcncflem  15321  2sqlem6  15839  vtxd0nedgbfi  16105  uspgr2wlkeq  16162  upgr2wlkdc  16172  bj-indind  16463
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