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Mirrors > Home > ILE Home > Th. List > opelcnvg | Unicode version |
Description: Ordered-pair membership in converse. (Contributed by NM, 13-May-1999.) (Proof shortened by Andrew Salmon, 27-Aug-2011.) |
Ref | Expression |
---|---|
opelcnvg |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | breq2 3980 | . . 3 | |
2 | breq1 3979 | . . 3 | |
3 | df-cnv 4606 | . . 3 | |
4 | 1, 2, 3 | brabg 4241 | . 2 |
5 | df-br 3977 | . 2 | |
6 | df-br 3977 | . 2 | |
7 | 4, 5, 6 | 3bitr3g 221 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wb 104 wcel 2135 cop 3573 class class class wbr 3976 ccnv 4597 |
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-io 699 ax-5 1434 ax-7 1435 ax-gen 1436 ax-ie1 1480 ax-ie2 1481 ax-8 1491 ax-10 1492 ax-11 1493 ax-i12 1494 ax-bndl 1496 ax-4 1497 ax-17 1513 ax-i9 1517 ax-ial 1521 ax-i5r 1522 ax-14 2138 ax-ext 2146 ax-sep 4094 ax-pow 4147 ax-pr 4181 |
This theorem depends on definitions: df-bi 116 df-3an 969 df-tru 1345 df-nf 1448 df-sb 1750 df-eu 2016 df-mo 2017 df-clab 2151 df-cleq 2157 df-clel 2160 df-nfc 2295 df-v 2723 df-un 3115 df-in 3117 df-ss 3124 df-pw 3555 df-sn 3576 df-pr 3577 df-op 3579 df-br 3977 df-opab 4038 df-cnv 4606 |
This theorem is referenced by: brcnvg 4779 opelcnv 4780 fvimacnv 5594 cnvf1olem 6183 brtposg 6213 xrlenlt 7954 |
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