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Theorem ordtr1 4509
Description: Transitive law for ordinal classes. (Contributed by NM, 12-Dec-2004.)
Assertion
Ref Expression
ordtr1  |-  ( Ord 
C  ->  ( ( A  e.  B  /\  B  e.  C )  ->  A  e.  C ) )

Proof of Theorem ordtr1
StepHypRef Expression
1 ordtr 4499 . 2  |-  ( Ord 
C  ->  Tr  C
)
2 trel 4215 . 2  |-  ( Tr  C  ->  ( ( A  e.  B  /\  B  e.  C )  ->  A  e.  C ) )
31, 2syl 14 1  |-  ( Ord 
C  ->  ( ( A  e.  B  /\  B  e.  C )  ->  A  e.  C ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    e. wcel 2203   Tr wtr 4208   Ord word 4483
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-ext 2214
This theorem depends on definitions:  df-bi 117  df-tru 1401  df-nf 1510  df-sb 1812  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-v 2815  df-in 3217  df-ss 3224  df-uni 3915  df-tr 4209  df-iord 4487
This theorem is referenced by:  ontr1  4510  ordwe  4698  dfsmo2  6518  smores2  6525  smoel  6531  tfr1onlemsucaccv  6572  tfr1onlembxssdm  6574  tfr1onlembfn  6575  tfr1onlemaccex  6579  tfr1onlemres  6580  tfrcllemsucaccv  6585  tfrcllembxssdm  6587  tfrcllembfn  6588  tfrcllemaccex  6592  tfrcllemres  6593  tfrcl  6595  ordiso2  7326
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