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Theorem cbvfo 5368
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  F `
Assertion
Ref Expression
cbvfo  F : -onto->
Distinct variable groups:   ,,   ,   , F,   ,   ,
Allowed substitution hints:   ()   ()   ()

Proof of Theorem cbvfo
StepHypRef Expression
1 fofn 5051 . . 3  F : -onto->  F  Fn
2 cbvfo.1 . . . . . 6  F `
32bicomd 129 . . . . 5  F `
43eqcoms 2040 . . . 4  F `
54ralrn 5248 . . 3  F  Fn  ran  F
61, 5syl 14 . 2  F : -onto->  ran  F
7 forn 5052 . . 3  F : -onto->  ran 
F
87raleqdv 2505 . 2  F : -onto->  ran  F
96, 8bitr3d 179 1  F : -onto->
Colors of variables: wff set class
Syntax hints:   wi 4   wb 98   wceq 1242  wral 2300   ran crn 4289    Fn wfn 4840   -onto->wfo 4843   ` cfv 4845
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-io 629  ax-5 1333  ax-7 1334  ax-gen 1335  ax-ie1 1379  ax-ie2 1380  ax-8 1392  ax-10 1393  ax-11 1394  ax-i12 1395  ax-bnd 1396  ax-4 1397  ax-14 1402  ax-17 1416  ax-i9 1420  ax-ial 1424  ax-i5r 1425  ax-ext 2019  ax-sep 3866  ax-pow 3918  ax-pr 3935
This theorem depends on definitions:  df-bi 110  df-3an 886  df-tru 1245  df-nf 1347  df-sb 1643  df-eu 1900  df-mo 1901  df-clab 2024  df-cleq 2030  df-clel 2033  df-nfc 2164  df-ral 2305  df-rex 2306  df-v 2553  df-sbc 2759  df-un 2916  df-in 2918  df-ss 2925  df-pw 3353  df-sn 3373  df-pr 3374  df-op 3376  df-uni 3572  df-br 3756  df-opab 3810  df-mpt 3811  df-id 4021  df-xp 4294  df-rel 4295  df-cnv 4296  df-co 4297  df-dm 4298  df-rn 4299  df-iota 4810  df-fun 4847  df-fn 4848  df-f 4849  df-fo 4851  df-fv 4853
This theorem is referenced by:  cocan2  5371
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