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Theorem sotri 4315
Description: A strict order relation is a transitive relation.
Hypotheses
Ref Expression
soi.1 |- A e. _V
soi.2 |- R Or S
soi.3 |- R C_ (S X. S)
sotri.4 |- B e. _V
sotri.5 |- C e. _V
Assertion
Ref Expression
sotri |- ((ARB /\ BRC) -> ARC)

Proof of Theorem sotri
StepHypRef Expression
1 id 73 . . . . . 6 |- ((A e. S /\ B e. S /\ C e. S) -> (A e. S /\ B e. S /\ C e. S))
213exp 1066 . . . . 5 |- (A e. S -> (B e. S -> (C e. S -> (A e. S /\ B e. S /\ C e. S))))
32a1dd 53 . . . 4 |- (A e. S -> (B e. S -> (B e. S -> (C e. S -> (A e. S /\ B e. S /\ C e. S)))))
43imp43 397 . . 3 |- (((A e. S /\ B e. S) /\ (B e. S /\ C e. S)) -> (A e. S /\ B e. S /\ C e. S))
5 sotri.4 . . . 4 |- B e. _V
6 soi.3 . . . 4 |- R C_ (S X. S)
75, 6brel 4048 . . 3 |- (ARB -> (A e. S /\ B e. S))
8 sotri.5 . . . 4 |- C e. _V
98, 6brel 4048 . . 3 |- (BRC -> (B e. S /\ C e. S))
104, 7, 9syl2an 503 . 2 |- ((ARB /\ BRC) -> (A e. S /\ B e. S /\ C e. S))
11 soi.2 . . 3 |- R Or S
12 sotr 3611 . . 3 |- ((R Or S /\ (A e. S /\ B e. S /\ C e. S)) -> ((ARB /\ BRC) -> ARC))
1311, 12mpan 759 . 2 |- ((A e. S /\ B e. S /\ C e. S) -> ((ARB /\ BRC) -> ARC))
1410, 13mpcom 60 1 |- ((ARB /\ BRC) -> ARC)
Colors of variables: wff set class
Syntax hints:   -> wi 3   /\ wa 240   /\ w3a 858   e. wcel 1300  _Vcvv 2292   C_ wss 2593   class class class wbr 3338   Or wor 3590   X. cxp 3984
This theorem is referenced by:  son2lpi 4316  ltsopq 6227  ltrpq 6237  1pr 6269  prlem934 6291  ltexprlem4 6297  reclem2pr 6309  reclem4pr 6311  ltsosr 6355  addgt0sr 6365  suppsr2 6375  suppsr3 6376  ltsor 6413
This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-7 1304  ax-gen 1305  ax-8 1306  ax-9 1307  ax-10 1308  ax-11 1309  ax-12 1310  ax-14 1312  ax-17 1317  ax-4 1319  ax-5o 1321  ax-6o 1324  ax-9o 1481  ax-10o 1500  ax-16 1580  ax-11o 1588  ax-ext 1865  ax-sep 3438  ax-nul 3445  ax-pow 3481  ax-pr 3524
This theorem depends on definitions:  df-bi 164  df-or 241  df-an 242  df-3an 860  df-ex 1327  df-sb 1536  df-eu 1775  df-mo 1776  df-clab 1872  df-cleq 1877  df-clel 1880  df-ne 2019  df-ral 2109  df-v 2294  df-dif 2597  df-un 2600  df-in 2603  df-ss 2605  df-nul 2876  df-pw 3035  df-sn 3049  df-pr 3050  df-op 3053  df-br 3339  df-opab 3396  df-po 3591  df-so 3604  df-xp 4000
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