Theorem ordtr1 4514

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 4504	. 2 |- ( Ord C -> Tr C )
2		trel 4220	. 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 2205   Tr wtr 4213   Ord word 4488

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 2216

This theorem depends on definitions:  df-bi 117  df-tru 1401  df-nf 1510  df-sb 1812  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-v 2817  df-in 3220  df-ss 3227  df-uni 3920  df-tr 4214  df-iord 4492

This theorem is referenced by:  ontr1  4515  ordwe  4703  dfsmo2  6531  smores2  6538  smoel  6544  tfr1onlemsucaccv  6585  tfr1onlembxssdm  6587  tfr1onlembfn  6588  tfr1onlemaccex  6592  tfr1onlemres  6593  tfrcllemsucaccv  6598  tfrcllembxssdm  6600  tfrcllembfn  6601  tfrcllemaccex  6605  tfrcllemres  6606  tfrcl  6608  ordiso2  7339