Theorem ordtr1 4424

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 4414	. 2 |- ( Ord C -> Tr C )
2		trel 4139	. 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 2167   Tr wtr 4132   Ord word 4398

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 710  ax-5 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-ext 2178

This theorem depends on definitions:  df-bi 117  df-tru 1367  df-nf 1475  df-sb 1777  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-v 2765  df-in 3163  df-ss 3170  df-uni 3841  df-tr 4133  df-iord 4402

This theorem is referenced by:  ontr1  4425  ordwe  4613  dfsmo2  6354  smores2  6361  smoel  6367  tfr1onlemsucaccv  6408  tfr1onlembxssdm  6410  tfr1onlembfn  6411  tfr1onlemaccex  6415  tfr1onlemres  6416  tfrcllemsucaccv  6421  tfrcllembxssdm  6423  tfrcllembfn  6424  tfrcllemaccex  6428  tfrcllemres  6429  tfrcl  6431  ordiso2  7110