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Theorem raaan 3321
Description: Rearrange restricted quantifiers. (Contributed by NM, 26-Oct-2010.)
Hypotheses
Ref Expression
raaan.1 yφ
raaan.2 xψ
Assertion
Ref Expression
raaan (x A y A (φ ψ) ↔ (x A φ y A ψ))
Distinct variable group:   x,y,A
Allowed substitution hints:   φ(x,y)   ψ(x,y)

Proof of Theorem raaan
StepHypRef Expression
1 raaan.1 . . . 4 yφ
2 raaan.2 . . . 4 xψ
31, 2raaanlem 3320 . . 3 (x x A → (x A y A (φ ψ) ↔ (x A φ y A ψ)))
43pm5.74i 169 . 2 ((x x Ax A y A (φ ψ)) ↔ (x x A → (x A φ y A ψ)))
5 ralm 3319 . 2 ((x x Ax A y A (φ ψ)) ↔ x A y A (φ ψ))
6 jcab 535 . . 3 ((x x A → (x A φ y A ψ)) ↔ ((x x Ax A φ) (x x Ay A ψ)))
7 ralm 3319 . . . 4 ((x x Ax A φ) ↔ x A φ)
8 eleq1 2097 . . . . . . 7 (x = y → (x Ay A))
98cbvexv 1792 . . . . . 6 (x x Ay y A)
109imbi1i 227 . . . . 5 ((x x Ay A ψ) ↔ (y y Ay A ψ))
11 ralm 3319 . . . . 5 ((y y Ay A ψ) ↔ y A ψ)
1210, 11bitri 173 . . . 4 ((x x Ay A ψ) ↔ y A ψ)
137, 12anbi12i 433 . . 3 (((x x Ax A φ) (x x Ay A ψ)) ↔ (x A φ y A ψ))
146, 13bitri 173 . 2 ((x x A → (x A φ y A ψ)) ↔ (x A φ y A ψ))
154, 5, 143bitr3i 199 1 (x A y A (φ ψ) ↔ (x A φ y A ψ))
Colors of variables: wff set class
Syntax hints:  wi 4   wa 97  wb 98  wnf 1346  wex 1378   wcel 1390  wral 2300
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-5 1333  ax-7 1334  ax-gen 1335  ax-ie1 1379  ax-ie2 1380  ax-8 1392  ax-4 1397  ax-17 1416  ax-i9 1420  ax-ial 1424  ax-i5r 1425  ax-ext 2019
This theorem depends on definitions:  df-bi 110  df-tru 1245  df-nf 1347  df-cleq 2030  df-clel 2033  df-nfc 2164  df-ral 2305
This theorem is referenced by:  raaanv  3322
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