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Theorem trinxp 5018
Description: The relation induced by a transitive relation on a part of its field is transitive. (Taking the intersection of a relation with a square cross product is a way to restrict it to a subset of its field.) (Contributed by FL, 31-Jul-2009.)
Assertion
Ref Expression
trinxp  |-  ( ( R  o.  R ) 
C_  R  ->  (
( R  i^i  ( A  X.  A ) )  o.  ( R  i^i  ( A  X.  A
) ) )  C_  ( R  i^i  ( A  X.  A ) ) )

Proof of Theorem trinxp
StepHypRef Expression
1 xpidtr 5015 . 2  |-  ( ( A  X.  A )  o.  ( A  X.  A ) )  C_  ( A  X.  A
)
2 trin2 5016 . 2  |-  ( ( ( R  o.  R
)  C_  R  /\  ( ( A  X.  A )  o.  ( A  X.  A ) ) 
C_  ( A  X.  A ) )  -> 
( ( R  i^i  ( A  X.  A
) )  o.  ( R  i^i  ( A  X.  A ) ) ) 
C_  ( R  i^i  ( A  X.  A
) ) )
31, 2mpan2 425 1  |-  ( ( R  o.  R ) 
C_  R  ->  (
( R  i^i  ( A  X.  A ) )  o.  ( R  i^i  ( A  X.  A
) ) )  C_  ( R  i^i  ( A  X.  A ) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    i^i cin 3128    C_ wss 3129    X. cxp 4621    o. ccom 4627
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 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-14 2151  ax-ext 2159  ax-sep 4118  ax-pow 4171  ax-pr 4206
This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-nf 1461  df-sb 1763  df-eu 2029  df-mo 2030  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-ral 2460  df-rex 2461  df-v 2739  df-un 3133  df-in 3135  df-ss 3142  df-pw 3576  df-sn 3597  df-pr 3598  df-op 3600  df-br 4001  df-opab 4062  df-xp 4629  df-rel 4630  df-co 4632
This theorem is referenced by: (None)
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