Theorem ordtr1 4528

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

Step	Hyp	Ref	Expression
1		ordtr 4518	. 2 |- ( Ord C -> Tr C )
2		trel 4231	. 2 |- ( Tr C -> ( ( A e. B /\ B e. C ) -> A e. C ) )
3	1, 2	syl 14	1 |- ( Ord C -> ( ( A e. B /\ B e. C ) -> A e. C ) )

Syntax hints:   -> wi 4   /\ wa 104   e. wcel 2209   Tr wtr 4224   Ord word 4502

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-ext 2220

This theorem depends on definitions:  df-bi 117  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-v 2823  df-in 3226  df-ss 3233  df-uni 3931  df-tr 4225  df-iord 4506

This theorem is referenced by:  ontr1  4529  ordwe  4718  dfsmo2  6548  smores2  6555  smoel  6561  tfr1onlemsucaccv  6602  tfr1onlembxssdm  6604  tfr1onlembfn  6605  tfr1onlemaccex  6609  tfr1onlemres  6610  tfrcllemsucaccv  6615  tfrcllembxssdm  6617  tfrcllembfn  6618  tfrcllemaccex  6622  tfrcllemres  6623  tfrcl  6625  ordiso2  7365