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Theorem trinxp 4748
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 4745 . 2  |-  ( ( A  X.  A )  o.  ( A  X.  A ) )  C_  ( A  X.  A
)
2 trin2 4746 . 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 416 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 2973    C_ wss 2974    X. cxp 4369    o. ccom 4375
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-io 663  ax-5 1377  ax-7 1378  ax-gen 1379  ax-ie1 1423  ax-ie2 1424  ax-8 1436  ax-10 1437  ax-11 1438  ax-i12 1439  ax-bndl 1440  ax-4 1441  ax-14 1446  ax-17 1460  ax-i9 1464  ax-ial 1468  ax-i5r 1469  ax-ext 2064  ax-sep 3904  ax-pow 3956  ax-pr 3972
This theorem depends on definitions:  df-bi 115  df-3an 922  df-tru 1288  df-nf 1391  df-sb 1687  df-eu 1945  df-mo 1946  df-clab 2069  df-cleq 2075  df-clel 2078  df-nfc 2209  df-ral 2354  df-rex 2355  df-v 2604  df-un 2978  df-in 2980  df-ss 2987  df-pw 3392  df-sn 3412  df-pr 3413  df-op 3415  df-br 3794  df-opab 3848  df-xp 4377  df-rel 4378  df-co 4380
This theorem is referenced by: (None)
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