| 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 2424 |
. . 3
| |
| 2 | 1 | eleq2i 1153 |
. 2
|
| 3 | elopab 2110 |
. 2
| |
| 4 | 2, 3 | bitr 151 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: elxp2 2443 hbxp 2444 opelxpex 2445 opelxp 2452 ralxp 2456 elxp3 2460 elvv 2464 xpss 2465 xp0r 2474 0nelxp 2475 elxp4 2640 elxp5 2641 fnoprval 3042 xpsnen 3339 xpcomen 3343 xpassen 3344 aceq5lem1 3558 aceq5lem4 3561 elreal 4044 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 ax-4 673 ax-5 674 ax-6 675 ax-7 676 ax-gen 677 ax-8 798 ax-9 799 ax-10 800 ax-11 801 ax-12 802 ax-13 804 ax-14 805 ax-16 922 ax-17 925 ax-ext 1074 ax-rep 1075 ax-pow 1077 |
| This theorem depends on definitions: df-bi 128 df-or 197 df-an 198 df-ex 679 df-sb 853 df-clab 1093 df-cleq 1097 df-clel 1099 df-v 1349 df-dif 1489 df-un 1490 df-in 1491 df-ss 1492 df-nul 1708 df-pw 1799 df-sn 1811 df-pr 1812 df-op 1815 df-opab 2098 df-xp 2424 |