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Theorem foelrn 5893
Description: Property of a surjective function. (Contributed by Jeff Madsen, 4-Jan-2011.) (Proof shortened by BJ, 6-Jul-2022.)
Assertion
Ref Expression
foelrn  |-  ( ( F : A -onto-> B  /\  C  e.  B
)  ->  E. x  e.  A  C  =  ( F `  x ) )
Distinct variable groups:    x, A    x, C    x, F
Allowed substitution hint:    B( x)

Proof of Theorem foelrn
StepHypRef Expression
1 foima2 5892 . 2  |-  ( F : A -onto-> B  -> 
( C  e.  B  <->  E. x  e.  A  C  =  ( F `  x ) ) )
21biimpa 296 1  |-  ( ( F : A -onto-> B  /\  C  e.  B
)  ->  E. x  e.  A  C  =  ( F `  x ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    = wceq 1397    e. wcel 2202   E.wrex 2511   -onto->wfo 5324   ` cfv 5326
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-rex 2516  df-v 2804  df-sbc 3032  df-un 3204  df-in 3206  df-ss 3213  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-br 4089  df-opab 4151  df-id 4390  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-rn 4736  df-res 4737  df-ima 4738  df-iota 5286  df-fun 5328  df-fn 5329  df-f 5330  df-fo 5332  df-fv 5334
This theorem is referenced by:  foco2  5894  ctmlemr  7307  ctm  7308  ctssdclemn0  7309  ctssdccl  7310  ctssdc  7312  enumctlemm  7313  fodju0  7346  exmidfodomrlemr  7413  exmidfodomrlemrALT  7414  ennnfonelemrn  13041  ctinf  13052  ctiunctlemfo  13061  znidom  14673  znrrg  14676  subctctexmid  16604  pw1nct  16607
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