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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 4749 |
. 2
| |
| 2 | vex 2806 |
. . . . . . 7
| |
| 3 | vex 2806 |
. . . . . . 7
| |
| 4 | 2, 3 | opth2 4338 |
. . . . . 6
|
| 5 | eleq1 2294 |
. . . . . . 7
| |
| 6 | eleq1 2294 |
. . . . . . 7
| |
| 7 | 5, 6 | bi2anan9 610 |
. . . . . 6
|
| 8 | 4, 7 | sylbi 121 |
. . . . 5
|
| 9 | 8 | biimprcd 160 |
. . . 4
|
| 10 | 9 | rexlimivv 2657 |
. . 3
|
| 11 | eqid 2231 |
. . . 4
| |
| 12 | opeq1 3867 |
. . . . . 6
| |
| 13 | 12 | eqeq2d 2243 |
. . . . 5
|
| 14 | opeq2 3868 |
. . . . . 6
| |
| 15 | 14 | eqeq2d 2243 |
. . . . 5
|
| 16 | 13, 15 | rspc2ev 2926 |
. . . 4
|
| 17 | 11, 16 | mp3an3 1363 |
. . 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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-14 2205 ax-ext 2213 ax-sep 4212 ax-pow 4270 ax-pr 4305 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ral 2516 df-rex 2517 df-v 2805 df-un 3205 df-in 3207 df-ss 3214 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 df-opab 4156 df-xp 4737 |
| This theorem is referenced by: brxp 4762 opelxpi 4763 opelxp1 4765 opelxp2 4766 opthprc 4783 elxp3 4786 opeliunxp 4787 optocl 4808 xpiindim 4873 opelres 5024 resiexg 5064 restidsing 5075 codir 5132 qfto 5133 xpmlem 5164 rnxpid 5178 ssrnres 5186 dfco2 5243 relssdmrn 5264 ressn 5284 opelf 5515 fnovex 6061 oprab4 6102 resoprab 6127 elmpocl 6227 fo1stresm 6333 fo2ndresm 6334 dfoprab4 6364 xporderlem 6405 f1od2 6409 brecop 6837 xpdom2 7058 djulclb 7314 djuss 7329 enq0enq 7711 enq0sym 7712 enq0tr 7714 nqnq0pi 7718 nnnq0lem1 7726 elinp 7754 genipv 7789 prsrlem1 8022 gt0srpr 8028 opelcn 8106 opelreal 8107 elreal2 8110 frecuzrdgrrn 10733 frec2uzrdg 10734 frecuzrdgrcl 10735 frecuzrdgsuc 10739 frecuzrdgrclt 10740 frecuzrdgsuctlem 10748 fisumcom2 12079 fprodcom2fi 12267 sqpweven 12827 2sqpwodd 12828 phimullem 12877 relelbasov 13225 txuni2 15067 txcnp 15082 txcnmpt 15084 txdis1cn 15089 txlm 15090 xmeterval 15246 limccnp2lem 15487 limccnp2cntop 15488 lgsquadlem1 15896 lgsquadlem2 15897 |
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