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Theorem reltrncnv 14457
Description: A relation is transitive iff its converse is transitive.
Assertion
Ref Expression
reltrncnv |- (Rel R -> ((R o. R) C_ R <-> (`'R o. `'R) C_ `'R))

Proof of Theorem reltrncnv
StepHypRef Expression
1 cnvss 4134 . . 3 |- ((R o. R) C_ R -> `'(R o. R) C_ `'R)
2 cnvco 4145 . . 3 |- `'(R o. R) = (`'R o. `'R)
31, 2syl5ssr 2662 . 2 |- ((R o. R) C_ R -> (`'R o. `'R) C_ `'R)
4 cnvss 4134 . . . 4 |- ((`'R o. `'R) C_ `'R -> `'(`'R o. `'R) C_ `'`'R)
5 cnvco 4145 . . . . 5 |- `'(`'R o. `'R) = (`'`'R o. `'`'R)
6 sseq1 2637 . . . . . 6 |- (`'(`'R o. `'R) = (`'`'R o. `'`'R) -> (`'(`'R o. `'R) C_ `'`'R <-> (`'`'R o. `'`'R) C_ `'`'R))
7 dfrel2 4358 . . . . . . . 8 |- (Rel R <-> `'`'R = R)
8 coeq1 4123 . . . . . . . . . . 11 |- (`'`'R = R -> (`'`'R o. `'`'R) = (R o. `'`'R))
9 coeq2 4124 . . . . . . . . . . 11 |- (`'`'R = R -> (R o. `'`'R) = (R o. R))
108, 9eqtrd 1925 . . . . . . . . . 10 |- (`'`'R = R -> (`'`'R o. `'`'R) = (R o. R))
11 id 73 . . . . . . . . . 10 |- (`'`'R = R -> `'`'R = R)
1210, 11sseq12d 2646 . . . . . . . . 9 |- (`'`'R = R -> ((`'`'R o. `'`'R) C_ `'`'R <-> (R o. R) C_ R))
1312biimpd 170 . . . . . . . 8 |- (`'`'R = R -> ((`'`'R o. `'`'R) C_ `'`'R -> (R o. R) C_ R))
147, 13sylbi 216 . . . . . . 7 |- (Rel R -> ((`'`'R o. `'`'R) C_ `'`'R -> (R o. R) C_ R))
1514com12 14 . . . . . 6 |- ((`'`'R o. `'`'R) C_ `'`'R -> (Rel R -> (R o. R) C_ R))
166, 15syl6bi 231 . . . . 5 |- (`'(`'R o. `'R) = (`'`'R o. `'`'R) -> (`'(`'R o. `'R) C_ `'`'R -> (Rel R -> (R o. R) C_ R)))
175, 16ax-mp 7 . . . 4 |- (`'(`'R o. `'R) C_ `'`'R -> (Rel R -> (R o. R) C_ R))
184, 17syl 12 . . 3 |- ((`'R o. `'R) C_ `'R -> (Rel R -> (R o. R) C_ R))
1918com12 14 . 2 |- (Rel R -> ((`'R o. `'R) C_ `'R -> (R o. R) C_ R))
203, 19impbid2 576 1 |- (Rel R -> ((R o. R) C_ R <-> (`'R o. `'R) C_ `'R))
Colors of variables: wff set class
Syntax hints:   -> wi 3   <-> wb 163   = wceq 1298   C_ wss 2593  `'ccnv 3985   o. ccom 3990  Rel wrel 3991
This theorem is referenced by:  dupre1 14584
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-ex 1327  df-sb 1536  df-eu 1775  df-mo 1776  df-clab 1872  df-cleq 1877  df-clel 1880  df-ne 2019  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-xp 4000  df-rel 4001  df-cnv 4002  df-co 4003
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