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Theorem cbviinv 4124
 Description: Change bound variables in an indexed intersection. (Contributed by Jeff Hankins, 26-Aug-2009.)
Hypothesis
Ref Expression
cbviunv.1
Assertion
Ref Expression
cbviinv
Distinct variable groups:   ,   ,   ,   ,
Allowed substitution hints:   ()   ()

Proof of Theorem cbviinv
StepHypRef Expression
1 nfcv 2572 . 2
2 nfcv 2572 . 2
3 cbviunv.1 . 2
41, 2, 3cbviin 4122 1
 Colors of variables: wff set class Syntax hints:   wi 4   wceq 1652  ciin 4087 This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1555  ax-5 1566  ax-17 1626  ax-9 1666  ax-8 1687  ax-6 1744  ax-7 1749  ax-11 1761  ax-12 1950  ax-ext 2417 This theorem depends on definitions:  df-bi 178  df-or 360  df-an 361  df-tru 1328  df-ex 1551  df-nf 1554  df-sb 1659  df-clab 2423  df-cleq 2429  df-clel 2432  df-nfc 2561  df-ral 2703  df-iin 4089
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