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Theorem f1oen 7039
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 7037 . 2  |-  ( ( A  e.  _V  /\  F : A -1-1-onto-> B )  ->  A  ~~  B )
31, 2mpan 428 1  |-  ( F : A -1-1-onto-> B  ->  A  ~~  B )
Colors of variables: wff set class
Syntax hints:    -> wi 4    e. wcel 2209   _Vcvv 2821   class class class wbr 4128   -1-1-onto->wf1o 5374    ~~ cen 7014
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 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-coll 4244  ax-sep 4247  ax-pow 4309  ax-pr 4344  ax-un 4576
This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-rex 2534  df-reu 2535  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-un 3224  df-in 3226  df-ss 3233  df-pw 3690  df-sn 3714  df-pr 3715  df-op 3717  df-uni 3934  df-iun 4012  df-br 4129  df-opab 4191  df-mpt 4192  df-id 4436  df-xp 4778  df-rel 4779  df-cnv 4780  df-co 4781  df-dm 4782  df-rn 4783  df-res 4784  df-ima 4785  df-iota 5335  df-fun 5377  df-fn 5378  df-f 5379  df-f1 5380  df-fo 5381  df-f1o 5382  df-fv 5383  df-en 7017
This theorem is referenced by:  dju1p1e2  7543  cc2lem  7626  uzenom  10845  xnn0nnen  10857  ballotfilem8  13263  xpnnen  13268  ennnfonelemen  13295  iooreen  17058
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