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Theorem f1oen2g 6809
Description: The domain and range of a one-to-one, onto function are equinumerous. This variation of f1oeng 6811 does not require the Axiom of Replacement. (Contributed by Mario Carneiro, 10-Sep-2015.)
Assertion
Ref Expression
f1oen2g ((𝐴𝑉𝐵𝑊𝐹:𝐴1-1-onto𝐵) → 𝐴𝐵)

Proof of Theorem f1oen2g
StepHypRef Expression
1 f1of 5500 . . . 4 (𝐹:𝐴1-1-onto𝐵𝐹:𝐴𝐵)
2 fex2 5422 . . . 4 ((𝐹:𝐴𝐵𝐴𝑉𝐵𝑊) → 𝐹 ∈ V)
31, 2syl3an1 1282 . . 3 ((𝐹:𝐴1-1-onto𝐵𝐴𝑉𝐵𝑊) → 𝐹 ∈ V)
433coml 1212 . 2 ((𝐴𝑉𝐵𝑊𝐹:𝐴1-1-onto𝐵) → 𝐹 ∈ V)
5 simp3 1001 . 2 ((𝐴𝑉𝐵𝑊𝐹:𝐴1-1-onto𝐵) → 𝐹:𝐴1-1-onto𝐵)
6 f1oen3g 6808 . 2 ((𝐹 ∈ V ∧ 𝐹:𝐴1-1-onto𝐵) → 𝐴𝐵)
74, 5, 6syl2anc 411 1 ((𝐴𝑉𝐵𝑊𝐹:𝐴1-1-onto𝐵) → 𝐴𝐵)
Colors of variables: wff set class
Syntax hints:  wi 4  w3a 980  wcel 2164  Vcvv 2760   class class class wbr 4029  wf 5250  1-1-ontowf1o 5253  cen 6792
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 710  ax-5 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-10 1516  ax-11 1517  ax-i12 1518  ax-bndl 1520  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-13 2166  ax-14 2167  ax-ext 2175  ax-sep 4147  ax-pow 4203  ax-pr 4238  ax-un 4464
This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-nf 1472  df-sb 1774  df-eu 2045  df-mo 2046  df-clab 2180  df-cleq 2186  df-clel 2189  df-nfc 2325  df-ral 2477  df-rex 2478  df-v 2762  df-un 3157  df-in 3159  df-ss 3166  df-pw 3603  df-sn 3624  df-pr 3625  df-op 3627  df-uni 3836  df-br 4030  df-opab 4091  df-xp 4665  df-rel 4666  df-cnv 4667  df-co 4668  df-dm 4669  df-rn 4670  df-fun 5256  df-fn 5257  df-f 5258  df-f1 5259  df-fo 5260  df-f1o 5261  df-en 6795
This theorem is referenced by:  f1oeng  6811  enrefg  6818  en2d  6822  en3d  6823  ener  6833  f1imaen2g  6847  cnven  6862  xpcomen  6881  exmidpw2en  6968  xpfi  6986  iccen  10072  nnenom  10505  eqgen  13297
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