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Theorem vtoclrbr 3207
Description: Variable to class conversion of transitive, reflexive relation.
Hypotheses
Ref Expression
vtoclr.1 |- Rel R
vtoclr.2 |- ((xRy /\ yRz) -> xRz)
vtoclrbr.3 |- xRx
Assertion
Ref Expression
vtoclrbr |- ((ARB /\ BRC) -> ARC)
Distinct variable groups:   x,y,A   y,B   x,z,C,y   x,R,y,z

Proof of Theorem vtoclrbr
StepHypRef Expression
1 vtoclr.1 . . 3 |- Rel R
2 vtoclr.2 . . 3 |- ((xRy /\ yRz) -> xRz)
31, 2vtoclr 3206 . 2 |- (C e. V -> ((ARB /\ BRC) -> ARC))
4 brprc 2656 . . . . 5 |- (-. C e. V -> (ARC <-> ARA))
5 breq1 2617 . . . . . . 7 |- (x = A -> (xRx <-> ARx))
6 breq2 2618 . . . . . . 7 |- (x = A -> (ARx <-> ARA))
75, 6bitrd 527 . . . . . 6 |- (x = A -> (xRx <-> ARA))
8 vtoclrbr.3 . . . . . 6 |- xRx
97, 8vtoclg 1843 . . . . 5 |- (A e. V -> ARA)
104, 9syl5bir 210 . . . 4 |- (-. C e. V -> (A e. V -> ARC))
111brrelexi 3203 . . . 4 |- (ARB -> A e. V)
1210, 11syl5 21 . . 3 |- (-. C e. V -> (ARB -> ARC))
1312adantrd 391 . 2 |- (-. C e. V -> ((ARB /\ BRC) -> ARC))
143, 13pm2.61i 126 1 |- ((ARB /\ BRC) -> ARC)
Colors of variables: wff set class
Syntax hints:  -. wn 2   -> wi 3   /\ wa 223   = wceq 954   e. wcel 956  Vcvv 1807   class class class wbr 2614  Rel wrel 3170
This theorem is referenced by:  entrt 4401  domtr 4402
This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-7 960  ax-gen 961  ax-8 962  ax-10 964  ax-11 965  ax-12 966  ax-13 967  ax-14 968  ax-17 969  ax-4 971  ax-5o 973  ax-6o 976  ax-9o 1121  ax-10o 1138  ax-16 1208  ax-11o 1216  ax-ext 1457  ax-sep 2698  ax-pow 2737  ax-pr 2774
This theorem depends on definitions:  df-bi 147  df-or 224  df-an 225  df-ex 979  df-sb 1170  df-eu 1380  df-mo 1381  df-clab 1462  df-cleq 1467  df-clel 1470  df-ne 1584  df-v 1808  df-dif 2045  df-un 2046  df-in 2047  df-ss 2049  df-nul 2277  df-pw 2398  df-sn 2408  df-pr 2409  df-op 2412  df-br 2615  df-opab 2662  df-xp 3179  df-rel 3180
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