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Mirrors > Home > ILE Home > Th. List > elxp | Unicode version |
Description: Membership in a cross product. (Contributed by NM, 4-Jul-1994.) |
Ref | Expression |
---|---|
elxp |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-xp 4369 | . . 3 | |
2 | 1 | eleq2i 2145 | . 2 |
3 | elopab 4013 | . 2 | |
4 | 2, 3 | bitri 182 | 1 |
Colors of variables: wff set class |
Syntax hints: wa 102 wb 103 wceq 1284 wex 1421 wcel 1433 cop 3401 copab 3838 cxp 4361 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-io 662 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-10 1436 ax-11 1437 ax-i12 1438 ax-bndl 1439 ax-4 1440 ax-14 1445 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 ax-sep 3896 ax-pow 3948 ax-pr 3964 |
This theorem depends on definitions: df-bi 115 df-3an 921 df-tru 1287 df-nf 1390 df-sb 1686 df-clab 2068 df-cleq 2074 df-clel 2077 df-nfc 2208 df-v 2603 df-un 2977 df-in 2979 df-ss 2986 df-pw 3384 df-sn 3404 df-pr 3405 df-op 3407 df-opab 3840 df-xp 4369 |
This theorem is referenced by: elxp2 4381 0nelxp 4390 0nelelxp 4391 rabxp 4398 elxp3 4412 elvv 4420 elvvv 4421 0xp 4438 xpmlem 4764 elxp4 4828 elxp5 4829 dfco2a 4841 opabex3d 5768 opabex3 5769 xp1st 5812 xp2nd 5813 poxp 5873 xpsnen 6318 xpcomco 6323 xpassen 6327 nqnq0pi 6628 |
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