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Theorem son2lpi 4943
Description: A strict order relation has no 2-cycle loops. (Contributed by NM, 10-Feb-1996.) (Revised by Mario Carneiro, 10-May-2013.)
Hypotheses
Ref Expression
soi.1 𝑅 Or 𝑆
soi.2 𝑅 ⊆ (𝑆 × 𝑆)
Assertion
Ref Expression
son2lpi ¬ (𝐴𝑅𝐵𝐵𝑅𝐴)

Proof of Theorem son2lpi
StepHypRef Expression
1 soi.1 . . 3 𝑅 Or 𝑆
2 soi.2 . . 3 𝑅 ⊆ (𝑆 × 𝑆)
31, 2soirri 4941 . 2 ¬ 𝐴𝑅𝐴
41, 2sotri 4942 . 2 ((𝐴𝑅𝐵𝐵𝑅𝐴) → 𝐴𝑅𝐴)
53, 4mto 652 1 ¬ (𝐴𝑅𝐵𝐵𝑅𝐴)
Colors of variables: wff set class
Syntax hints:  ¬ wn 3  wa 103  wss 3076   class class class wbr 3937   Or wor 4225   × cxp 4545
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 604  ax-in2 605  ax-io 699  ax-5 1424  ax-7 1425  ax-gen 1426  ax-ie1 1470  ax-ie2 1471  ax-8 1483  ax-10 1484  ax-11 1485  ax-i12 1486  ax-bndl 1487  ax-4 1488  ax-14 1493  ax-17 1507  ax-i9 1511  ax-ial 1515  ax-i5r 1516  ax-ext 2122  ax-sep 4054  ax-pow 4106  ax-pr 4139
This theorem depends on definitions:  df-bi 116  df-3an 965  df-tru 1335  df-nf 1438  df-sb 1737  df-clab 2127  df-cleq 2133  df-clel 2136  df-nfc 2271  df-ral 2422  df-rex 2423  df-v 2691  df-un 3080  df-in 3082  df-ss 3089  df-pw 3517  df-sn 3538  df-pr 3539  df-op 3541  df-br 3938  df-opab 3998  df-po 4226  df-iso 4227  df-xp 4553
This theorem is referenced by:  nqprdisj  7376  ltexprlemdisj  7438  recexprlemdisj  7462  caucvgprlemnkj  7498  caucvgprprlemnkltj  7521  caucvgprprlemnkeqj  7522  caucvgprprlemnjltk  7523
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