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Theorem foelrn 5888
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:𝐴onto𝐵𝐶𝐵) → ∃𝑥𝐴 𝐶 = (𝐹𝑥))
Distinct variable groups:   𝑥,𝐴   𝑥,𝐶   𝑥,𝐹
Allowed substitution hint:   𝐵(𝑥)

Proof of Theorem foelrn
StepHypRef Expression
1 foima2 5887 . 2 (𝐹:𝐴onto𝐵 → (𝐶𝐵 ↔ ∃𝑥𝐴 𝐶 = (𝐹𝑥)))
21biimpa 296 1 ((𝐹:𝐴onto𝐵𝐶𝐵) → ∃𝑥𝐴 𝐶 = (𝐹𝑥))
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104   = wceq 1395  wcel 2200  wrex 2509  ontowfo 5322  cfv 5324
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 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-14 2203  ax-ext 2211  ax-sep 4205  ax-pow 4262  ax-pr 4297
This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ral 2513  df-rex 2514  df-v 2802  df-sbc 3030  df-un 3202  df-in 3204  df-ss 3211  df-pw 3652  df-sn 3673  df-pr 3674  df-op 3676  df-uni 3892  df-br 4087  df-opab 4149  df-id 4388  df-xp 4729  df-rel 4730  df-cnv 4731  df-co 4732  df-dm 4733  df-rn 4734  df-res 4735  df-ima 4736  df-iota 5284  df-fun 5326  df-fn 5327  df-f 5328  df-fo 5330  df-fv 5332
This theorem is referenced by:  foco2  5889  ctmlemr  7298  ctm  7299  ctssdclemn0  7300  ctssdccl  7301  ctssdc  7303  enumctlemm  7304  fodju0  7337  exmidfodomrlemr  7403  exmidfodomrlemrALT  7404  ennnfonelemrn  13030  ctinf  13041  ctiunctlemfo  13050  znidom  14661  znrrg  14664  subctctexmid  16537  pw1nct  16540
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