| Metamath Proof Explorer |
< Previous
Next >
Related theorems Unicode version |
| Description: Membership in a cross product. |
| Ref | Expression |
|---|---|
| elxp |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-xp 4000 |
. . 3
| |
| 2 | 1 | eleq2i 1961 |
. 2
|
| 3 | elopab 3559 |
. 2
| |
| 4 | 2, 3 | bitri 190 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: elxp2 4019 hbxpOLD 4025 opelxp1 4026 opelxp 4036 opelxpOLD 4037 ralxp 4041 elxp3 4049 elvv 4053 elvvv 4054 xpss 4056 xp0r 4065 0nelxp 4066 0nelelxp 4067 elxp4 4379 elxp5 4380 dfco2a 4394 fnoprv 4946 xpsnen 5494 xpcomen 5498 xpassen 5500 aceq5lem1 5897 aceq5lem4 5900 elreal 6402 ssga 9455 gapmlem 9461 xp1st 10155 xp2nd 10156 poxp 13949 soxp 13950 cbcpcp 14504 opabex3 15701 txmet 15925 heiborlem24 15978 |
| 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-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-opab 3396 df-xp 4000 |