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Theorem funiunfvf 5998
 Description: The indexed union of a function's values is the union of its image under the index class. This version of funiunfv 5997 uses a bound-variable hypothesis in place of a distinct variable condition. (Contributed by NM, 26-Mar-2006.) (Revised by David Abernethy, 15-Apr-2013.)
Hypothesis
Ref Expression
funiunfvf.1
Assertion
Ref Expression
funiunfvf
Distinct variable group:   ,
Allowed substitution hint:   ()

Proof of Theorem funiunfvf
Dummy variable is distinct from all other variables.
StepHypRef Expression
1 funiunfvf.1 . . . 4
2 nfcv 2574 . . . 4
31, 2nffv 5737 . . 3
4 nfcv 2574 . . 3
5 fveq2 5730 . . 3
63, 4, 5cbviun 4130 . 2
7 funiunfv 5997 . 2
86, 7syl5eqr 2484 1
 Colors of variables: wff set class Syntax hints:   wi 4   wceq 1653  wnfc 2561  cuni 4017  ciun 4095  cima 4883   wfun 5450  cfv 5456 This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1556  ax-5 1567  ax-17 1627  ax-9 1667  ax-8 1688  ax-13 1728  ax-14 1730  ax-6 1745  ax-7 1750  ax-11 1762  ax-12 1951  ax-ext 2419  ax-sep 4332  ax-nul 4340  ax-pow 4379  ax-pr 4405 This theorem depends on definitions:  df-bi 179  df-or 361  df-an 362  df-3an 939  df-tru 1329  df-ex 1552  df-nf 1555  df-sb 1660  df-eu 2287  df-mo 2288  df-clab 2425  df-cleq 2431  df-clel 2434  df-nfc 2563  df-ne 2603  df-ral 2712  df-rex 2713  df-rab 2716  df-v 2960  df-sbc 3164  df-dif 3325  df-un 3327  df-in 3329  df-ss 3336  df-nul 3631  df-if 3742  df-sn 3822  df-pr 3823  df-op 3825  df-uni 4018  df-iun 4097  df-br 4215  df-opab 4269  df-mpt 4270  df-id 4500  df-xp 4886  df-rel 4887  df-cnv 4888  df-co 4889  df-dm 4890  df-rn 4891  df-res 4892  df-ima 4893  df-iota 5420  df-fun 5458  df-fn 5459  df-fv 5464
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