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| Mirrors > Home > ILE Home > Th. List > opelxp | Unicode version | ||
| Description: Ordered pair membership in a cross product. (Contributed by NM, 15-Nov-1994.) (Proof shortened by Andrew Salmon, 12-Aug-2011.) (Revised by Mario Carneiro, 26-Apr-2015.) |
| Ref | Expression |
|---|---|
| opelxp |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elxp2 4739 |
. 2
| |
| 2 | vex 2803 |
. . . . . . 7
| |
| 3 | vex 2803 |
. . . . . . 7
| |
| 4 | 2, 3 | opth2 4328 |
. . . . . 6
|
| 5 | eleq1 2292 |
. . . . . . 7
| |
| 6 | eleq1 2292 |
. . . . . . 7
| |
| 7 | 5, 6 | bi2anan9 608 |
. . . . . 6
|
| 8 | 4, 7 | sylbi 121 |
. . . . 5
|
| 9 | 8 | biimprcd 160 |
. . . 4
|
| 10 | 9 | rexlimivv 2654 |
. . 3
|
| 11 | eqid 2229 |
. . . 4
| |
| 12 | opeq1 3858 |
. . . . . 6
| |
| 13 | 12 | eqeq2d 2241 |
. . . . 5
|
| 14 | opeq2 3859 |
. . . . . 6
| |
| 15 | 14 | eqeq2d 2241 |
. . . . 5
|
| 16 | 13, 15 | rspc2ev 2923 |
. . . 4
|
| 17 | 11, 16 | mp3an3 1360 |
. . 3
|
| 18 | 10, 17 | impbii 126 |
. 2
|
| 19 | 1, 18 | bitri 184 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-14 2203 ax-ext 2211 ax-sep 4203 ax-pow 4260 ax-pr 4295 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ral 2513 df-rex 2514 df-v 2802 df-un 3202 df-in 3204 df-ss 3211 df-pw 3652 df-sn 3673 df-pr 3674 df-op 3676 df-opab 4147 df-xp 4727 |
| This theorem is referenced by: brxp 4752 opelxpi 4753 opelxp1 4755 opelxp2 4756 opthprc 4773 elxp3 4776 opeliunxp 4777 optocl 4798 xpiindim 4863 opelres 5014 resiexg 5054 restidsing 5065 codir 5121 qfto 5122 xpmlem 5153 rnxpid 5167 ssrnres 5175 dfco2 5232 relssdmrn 5253 ressn 5273 opelf 5502 fnovex 6044 oprab4 6085 resoprab 6110 elmpocl 6210 fo1stresm 6317 fo2ndresm 6318 dfoprab4 6348 xporderlem 6389 f1od2 6393 brecop 6787 xpdom2 7008 djulclb 7243 djuss 7258 enq0enq 7639 enq0sym 7640 enq0tr 7642 nqnq0pi 7646 nnnq0lem1 7654 elinp 7682 genipv 7717 prsrlem1 7950 gt0srpr 7956 opelcn 8034 opelreal 8035 elreal2 8038 frecuzrdgrrn 10658 frec2uzrdg 10659 frecuzrdgrcl 10660 frecuzrdgsuc 10664 frecuzrdgrclt 10665 frecuzrdgsuctlem 10673 fisumcom2 11986 fprodcom2fi 12174 sqpweven 12734 2sqpwodd 12735 phimullem 12784 relelbasov 13132 txuni2 14967 txcnp 14982 txcnmpt 14984 txdis1cn 14989 txlm 14990 xmeterval 15146 limccnp2lem 15387 limccnp2cntop 15388 lgsquadlem1 15793 lgsquadlem2 15794 |
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