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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 4809. (Contributed by NM, 17-Feb-2004.) |
| Ref | Expression |
|---|---|
| elxp4 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elex 2566 |
. 2
| |
| 2 | elex 2566 |
. . . 4
| |
| 3 | elex 2566 |
. . . 4
| |
| 4 | 2, 3 | anim12i 321 |
. . 3
|
| 5 | opexgOLD 3965 |
. . . . 5
| |
| 6 | 5 | adantl 262 |
. . . 4
|
| 7 | eleq1 2100 |
. . . . 5
| |
| 8 | 7 | adantr 261 |
. . . 4
|
| 9 | 6, 8 | mpbird 156 |
. . 3
|
| 10 | 4, 9 | sylan2 270 |
. 2
|
| 11 | elxp 4362 |
. . . 4
| |
| 12 | 11 | a1i 9 |
. . 3
|
| 13 | sneq 3386 |
. . . . . . . . . . . . 13
| |
| 14 | 13 | rneqd 4563 |
. . . . . . . . . . . 12
|
| 15 | 14 | unieqd 3591 |
. . . . . . . . . . 11
|
| 16 | vex 2560 |
. . . . . . . . . . . 12
| |
| 17 | vex 2560 |
. . . . . . . . . . . 12
| |
| 18 | 16, 17 | op2nda 4805 |
. . . . . . . . . . 11
|
| 19 | 15, 18 | syl6req 2089 |
. . . . . . . . . 10
|
| 20 | 19 | pm4.71ri 372 |
. . . . . . . . 9
|
| 21 | 20 | anbi1i 431 |
. . . . . . . 8
|
| 22 | anass 381 |
. . . . . . . 8
| |
| 23 | 21, 22 | bitri 173 |
. . . . . . 7
|
| 24 | 23 | exbii 1496 |
. . . . . 6
|
| 25 | snexgOLD 3935 |
. . . . . . . . 9
| |
| 26 | rnexg 4597 |
. . . . . . . . 9
| |
| 27 | 25, 26 | syl 14 |
. . . . . . . 8
|
| 28 | uniexg 4175 |
. . . . . . . 8
| |
| 29 | 27, 28 | syl 14 |
. . . . . . 7
|
| 30 | opeq2 3550 |
. . . . . . . . . 10
| |
| 31 | 30 | eqeq2d 2051 |
. . . . . . . . 9
|
| 32 | eleq1 2100 |
. . . . . . . . . 10
| |
| 33 | 32 | anbi2d 437 |
. . . . . . . . 9
|
| 34 | 31, 33 | anbi12d 442 |
. . . . . . . 8
|
| 35 | 34 | ceqsexgv 2673 |
. . . . . . 7
|
| 36 | 29, 35 | syl 14 |
. . . . . 6
|
| 37 | 24, 36 | syl5bb 181 |
. . . . 5
|
| 38 | sneq 3386 |
. . . . . . . . . . . 12
| |
| 39 | 38 | dmeqd 4537 |
. . . . . . . . . . 11
|
| 40 | 39 | unieqd 3591 |
. . . . . . . . . 10
|
| 41 | 40 | adantl 262 |
. . . . . . . . 9
|
| 42 | dmsnopg 4792 |
. . . . . . . . . . . . 13
| |
| 43 | 29, 42 | syl 14 |
. . . . . . . . . . . 12
|
| 44 | 43 | unieqd 3591 |
. . . . . . . . . . 11
|
| 45 | 16 | unisn 3596 |
. . . . . . . . . . 11
|
| 46 | 44, 45 | syl6eq 2088 |
. . . . . . . . . 10
|
| 47 | 46 | adantr 261 |
. . . . . . . . 9
|
| 48 | 41, 47 | eqtr2d 2073 |
. . . . . . . 8
|
| 49 | 48 | ex 108 |
. . . . . . 7
|
| 50 | 49 | pm4.71rd 374 |
. . . . . 6
|
| 51 | 50 | anbi1d 438 |
. . . . 5
|
| 52 | anass 381 |
. . . . . 6
| |
| 53 | 52 | a1i 9 |
. . . . 5
|
| 54 | 37, 51, 53 | 3bitrd 203 |
. . . 4
|
| 55 | 54 | exbidv 1706 |
. . 3
|
| 56 | dmexg 4596 |
. . . . . 6
| |
| 57 | 25, 56 | syl 14 |
. . . . 5
|
| 58 | uniexg 4175 |
. . . . 5
| |
| 59 | 57, 58 | syl 14 |
. . . 4
|
| 60 | opeq1 3549 |
. . . . . . 7
| |
| 61 | 60 | eqeq2d 2051 |
. . . . . 6
|
| 62 | eleq1 2100 |
. . . . . . 7
| |
| 63 | 62 | anbi1d 438 |
. . . . . 6
|
| 64 | 61, 63 | anbi12d 442 |
. . . . 5
|
| 65 | 64 | ceqsexgv 2673 |
. . . 4
|
| 66 | 59, 65 | syl 14 |
. . 3
|
| 67 | 12, 55, 66 | 3bitrd 203 |
. 2
|
| 68 | 1, 10, 67 | pm5.21nii 620 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-ia2 100 ax-ia3 101 ax-io 630 ax-5 1336 ax-7 1337 ax-gen 1338 ax-ie1 1382 ax-ie2 1383 ax-8 1395 ax-10 1396 ax-11 1397 ax-i12 1398 ax-bndl 1399 ax-4 1400 ax-13 1404 ax-14 1405 ax-17 1419 ax-i9 1423 ax-ial 1427 ax-i5r 1428 ax-ext 2022 ax-sep 3875 ax-pow 3927 ax-pr 3944 ax-un 4170 |
| This theorem depends on definitions: df-bi 110 df-3an 887 df-tru 1246 df-nf 1350 df-sb 1646 df-eu 1903 df-mo 1904 df-clab 2027 df-cleq 2033 df-clel 2036 df-nfc 2167 df-ral 2311 df-rex 2312 df-v 2559 df-un 2922 df-in 2924 df-ss 2931 df-pw 3361 df-sn 3381 df-pr 3382 df-op 3384 df-uni 3581 df-br 3765 df-opab 3819 df-xp 4351 df-rel 4352 df-cnv 4353 df-dm 4355 df-rn 4356 |
| This theorem is referenced by: elxp6 5796 xpdom2 6305 |
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