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Theorem vtoclrbr 2450
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 group(s):   x,y,z,A   x,B,y,z   x,C,y,z   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 2449 . 2 |- (C e. V -> ((ARB /\ BRC) -> ARC))
4 brprc 2097 . . . . 5 |- (-. C e. V -> (ARC <-> ARA))
5 breq1 2065 . . . . . . 7 |- (x = A -> (xRx <-> ARx))
6 breq2 2066 . . . . . . 7 |- (x = A -> (ARx <-> ARA))
75, 6bitrd 406 . . . . . 6 |- (x = A -> (xRx <-> ARA))
8 vtoclrbr.3 . . . . . 6 |- xRx
97, 8vtoclg 1383 . . . . 5 |- (A e. V -> ARA)
104, 9syl5bir 184 . . . 4 |- (-. C e. V -> (A e. V -> ARC))
111brrelexi 2447 . . . 4 |- (ARB -> A e. V)
1210, 11syl5 22 . . 3 |- (-. C e. V -> (ARB -> ARC))
1312adantrd 308 . 2 |- (-. C e. V -> ((ARB /\ BRC) -> ARC))
143, 13pm2.61i 110 1 |- ((ARB /\ BRC) -> ARC)
Colors of variables: wff set class
Syntax hints:  -. wn 1   -> wi 2   /\ wa 196   = wceq 1091   e. wcel 1092  Vcvv 1348   class class class wbr 2054  Rel wrel 2415
This theorem is referenced by:  entrt 3319  domtr 3320
This theorem was proved from axioms:  ax-1 3  ax-2 4  ax-3 5  ax-mp 6  ax-4 673  ax-5 674  ax-6 675  ax-7 676  ax-gen 677  ax-8 798  ax-9 799  ax-10 800  ax-11 801  ax-12 802  ax-13 804  ax-14 805  ax-16 922  ax-17 925  ax-ext 1074  ax-rep 1075  ax-pow 1077
This theorem depends on definitions:  df-bi 128  df-or 197  df-an 198  df-ex 679  df-sb 853  df-clab 1093  df-cleq 1097  df-clel 1099  df-v 1349  df-dif 1489  df-un 1490  df-in 1491  df-ss 1492  df-nul 1708  df-pw 1799  df-sn 1811  df-pr 1812  df-op 1815  df-br 2063  df-opab 2098  df-xp 2424  df-rel 2425
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