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| Mirrors > Home > ILE Home > Th. List > elxp4 | Unicode version | ||
| Description: Membership in a cross product. This version requires no quantifiers or dummy variables. See also elxp5 5225. (Contributed by NM, 17-Feb-2004.) |
| Ref | Expression |
|---|---|
| elxp4 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elex 2814 |
. 2
| |
| 2 | elex 2814 |
. . . 4
| |
| 3 | elex 2814 |
. . . 4
| |
| 4 | 2, 3 | anim12i 338 |
. . 3
|
| 5 | opexg 4320 |
. . . . 5
| |
| 6 | 5 | adantl 277 |
. . . 4
|
| 7 | eleq1 2294 |
. . . . 5
| |
| 8 | 7 | adantr 276 |
. . . 4
|
| 9 | 6, 8 | mpbird 167 |
. . 3
|
| 10 | 4, 9 | sylan2 286 |
. 2
|
| 11 | elxp 4742 |
. . . 4
| |
| 12 | 11 | a1i 9 |
. . 3
|
| 13 | sneq 3680 |
. . . . . . . . . . . . 13
| |
| 14 | 13 | rneqd 4961 |
. . . . . . . . . . . 12
|
| 15 | 14 | unieqd 3904 |
. . . . . . . . . . 11
|
| 16 | vex 2805 |
. . . . . . . . . . . 12
| |
| 17 | vex 2805 |
. . . . . . . . . . . 12
| |
| 18 | 16, 17 | op2nda 5221 |
. . . . . . . . . . 11
|
| 19 | 15, 18 | eqtr2di 2281 |
. . . . . . . . . 10
|
| 20 | 19 | pm4.71ri 392 |
. . . . . . . . 9
|
| 21 | 20 | anbi1i 458 |
. . . . . . . 8
|
| 22 | anass 401 |
. . . . . . . 8
| |
| 23 | 21, 22 | bitri 184 |
. . . . . . 7
|
| 24 | 23 | exbii 1653 |
. . . . . 6
|
| 25 | snexg 4274 |
. . . . . . . . 9
| |
| 26 | rnexg 4997 |
. . . . . . . . 9
| |
| 27 | 25, 26 | syl 14 |
. . . . . . . 8
|
| 28 | uniexg 4536 |
. . . . . . . 8
| |
| 29 | 27, 28 | syl 14 |
. . . . . . 7
|
| 30 | opeq2 3863 |
. . . . . . . . . 10
| |
| 31 | 30 | eqeq2d 2243 |
. . . . . . . . 9
|
| 32 | eleq1 2294 |
. . . . . . . . . 10
| |
| 33 | 32 | anbi2d 464 |
. . . . . . . . 9
|
| 34 | 31, 33 | anbi12d 473 |
. . . . . . . 8
|
| 35 | 34 | ceqsexgv 2935 |
. . . . . . 7
|
| 36 | 29, 35 | syl 14 |
. . . . . 6
|
| 37 | 24, 36 | bitrid 192 |
. . . . 5
|
| 38 | sneq 3680 |
. . . . . . . . . . . 12
| |
| 39 | 38 | dmeqd 4933 |
. . . . . . . . . . 11
|
| 40 | 39 | unieqd 3904 |
. . . . . . . . . 10
|
| 41 | 40 | adantl 277 |
. . . . . . . . 9
|
| 42 | dmsnopg 5208 |
. . . . . . . . . . . . 13
| |
| 43 | 29, 42 | syl 14 |
. . . . . . . . . . . 12
|
| 44 | 43 | unieqd 3904 |
. . . . . . . . . . 11
|
| 45 | 16 | unisn 3909 |
. . . . . . . . . . 11
|
| 46 | 44, 45 | eqtrdi 2280 |
. . . . . . . . . 10
|
| 47 | 46 | adantr 276 |
. . . . . . . . 9
|
| 48 | 41, 47 | eqtr2d 2265 |
. . . . . . . 8
|
| 49 | 48 | ex 115 |
. . . . . . 7
|
| 50 | 49 | pm4.71rd 394 |
. . . . . 6
|
| 51 | 50 | anbi1d 465 |
. . . . 5
|
| 52 | anass 401 |
. . . . . 6
| |
| 53 | 52 | a1i 9 |
. . . . 5
|
| 54 | 37, 51, 53 | 3bitrd 214 |
. . . 4
|
| 55 | 54 | exbidv 1873 |
. . 3
|
| 56 | dmexg 4996 |
. . . . . 6
| |
| 57 | 25, 56 | syl 14 |
. . . . 5
|
| 58 | uniexg 4536 |
. . . . 5
| |
| 59 | 57, 58 | syl 14 |
. . . 4
|
| 60 | opeq1 3862 |
. . . . . . 7
| |
| 61 | 60 | eqeq2d 2243 |
. . . . . 6
|
| 62 | eleq1 2294 |
. . . . . . 7
| |
| 63 | 62 | anbi1d 465 |
. . . . . 6
|
| 64 | 61, 63 | anbi12d 473 |
. . . . 5
|
| 65 | 64 | ceqsexgv 2935 |
. . . 4
|
| 66 | 59, 65 | syl 14 |
. . 3
|
| 67 | 12, 55, 66 | 3bitrd 214 |
. 2
|
| 68 | 1, 10, 67 | pm5.21nii 711 |
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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 ax-un 4530 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ral 2515 df-rex 2516 df-v 2804 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-br 4089 df-opab 4151 df-xp 4731 df-rel 4732 df-cnv 4733 df-dm 4735 df-rn 4736 |
| This theorem is referenced by: elxp6 6331 xpdom2 7014 |
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