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Theorem entri 7026
Description: A chained equinumerosity inference. (Contributed by NM, 25-Sep-2004.)
Hypotheses
Ref Expression
entri.1  |-  A  ~~  B
entri.2  |-  B  ~~  C
Assertion
Ref Expression
entri  |-  A  ~~  C

Proof of Theorem entri
StepHypRef Expression
1 entri.1 . 2  |-  A  ~~  B
2 entri.2 . 2  |-  B  ~~  C
3 entr 7024 . 2  |-  ( ( A  ~~  B  /\  B  ~~  C )  ->  A  ~~  C )
41, 2, 3mp2an 426 1  |-  A  ~~  C
Colors of variables: wff set class
Syntax hints:   class class class wbr 4109    ~~ cen 6973
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 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2205  ax-14 2206  ax-ext 2214  ax-sep 4228  ax-pow 4287  ax-pr 4322  ax-un 4554
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ral 2525  df-rex 2526  df-v 2815  df-un 3215  df-in 3217  df-ss 3224  df-pw 3671  df-sn 3695  df-pr 3696  df-op 3698  df-uni 3915  df-br 4110  df-opab 4172  df-id 4414  df-xp 4755  df-rel 4756  df-cnv 4757  df-co 4758  df-dm 4759  df-rn 4760  df-res 4761  df-ima 4762  df-fun 5354  df-fn 5355  df-f 5356  df-f1 5357  df-fo 5358  df-f1o 5359  df-er 6767  df-en 6976
This theorem is referenced by:  entr2i  7027  entr3i  7028  entr4i  7029  xnn0nnen  10799  xpomen  13146  znnen  13149  qnnen  13182
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