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Theorem cbvfo 6022
 Description: Change bound variable between domain and range of function. (Contributed by NM, 23-Feb-1997.) (Proof shortened by Mario Carneiro, 21-Mar-2015.)
Hypothesis
Ref Expression
cbvfo.1
Assertion
Ref Expression
cbvfo
Distinct variable groups:   ,,   ,   ,,   ,   ,
Allowed substitution hints:   ()   ()   ()

Proof of Theorem cbvfo
StepHypRef Expression
1 fofn 5655 . . 3
2 cbvfo.1 . . . . . 6
32bicomd 193 . . . . 5
43eqcoms 2439 . . . 4
54ralrn 5873 . . 3
61, 5syl 16 . 2
7 forn 5656 . . 3
87raleqdv 2910 . 2
96, 8bitr3d 247 1
 Colors of variables: wff set class Syntax hints:   wi 4   wb 177   wceq 1652  wral 2705   crn 4879   wfn 5449  wfo 5452  cfv 5454 This theorem is referenced by:  cbvexfo  6023  cocan2  6025  f1oweALT  6074  supisolem  7475  qtopeu  17748  deg1leb  20018  dchrelbas4  21027  cnpcon  24917  cocanfo  26419 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-14 1729  ax-6 1744  ax-7 1749  ax-11 1761  ax-12 1950  ax-ext 2417  ax-sep 4330  ax-nul 4338  ax-pr 4403 This theorem depends on definitions:  df-bi 178  df-or 360  df-an 361  df-3an 938  df-tru 1328  df-ex 1551  df-nf 1554  df-sb 1659  df-eu 2285  df-mo 2286  df-clab 2423  df-cleq 2429  df-clel 2432  df-nfc 2561  df-ne 2601  df-ral 2710  df-rex 2711  df-rab 2714  df-v 2958  df-sbc 3162  df-dif 3323  df-un 3325  df-in 3327  df-ss 3334  df-nul 3629  df-if 3740  df-sn 3820  df-pr 3821  df-op 3823  df-uni 4016  df-br 4213  df-opab 4267  df-mpt 4268  df-id 4498  df-xp 4884  df-rel 4885  df-cnv 4886  df-co 4887  df-dm 4888  df-rn 4889  df-iota 5418  df-fun 5456  df-fn 5457  df-f 5458  df-fo 5460  df-fv 5462
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