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Theorem f1oen 6910
Description: The domain and range of a one-to-one, onto function are equinumerous. (Contributed by NM, 19-Jun-1998.)
Hypothesis
Ref Expression
f1oen.1  |-  A  e. 
_V
Assertion
Ref Expression
f1oen  |-  ( F : A -1-1-onto-> B  ->  A  ~~  B )

Proof of Theorem f1oen
StepHypRef Expression
1 f1oen.1 . 2  |-  A  e. 
_V
2 f1oeng 6908 . 2  |-  ( ( A  e.  _V  /\  F : A -1-1-onto-> B )  ->  A  ~~  B )
31, 2mpan 424 1  |-  ( F : A -1-1-onto-> B  ->  A  ~~  B )
Colors of variables: wff set class
Syntax hints:    -> wi 4    e. wcel 2200   _Vcvv 2799   class class class wbr 4083   -1-1-onto->wf1o 5317    ~~ cen 6885
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-13 2202  ax-14 2203  ax-ext 2211  ax-coll 4199  ax-sep 4202  ax-pow 4258  ax-pr 4293  ax-un 4524
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-reu 2515  df-rab 2517  df-v 2801  df-sbc 3029  df-csb 3125  df-un 3201  df-in 3203  df-ss 3210  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3889  df-iun 3967  df-br 4084  df-opab 4146  df-mpt 4147  df-id 4384  df-xp 4725  df-rel 4726  df-cnv 4727  df-co 4728  df-dm 4729  df-rn 4730  df-res 4731  df-ima 4732  df-iota 5278  df-fun 5320  df-fn 5321  df-f 5322  df-f1 5323  df-fo 5324  df-f1o 5325  df-fv 5326  df-en 6888
This theorem is referenced by:  dju1p1e2  7375  cc2lem  7452  uzenom  10647  xnn0nnen  10659  xpnnen  12965  ennnfonelemen  12992  iooreen  16403
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