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Mirrors > Home > ILE Home > Th. List > elxp | Unicode version |
Description: Membership in a cross product. (Contributed by NM, 4-Jul-1994.) |
Ref | Expression |
---|---|
elxp |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-xp 4553 |
. . 3
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2 | 1 | eleq2i 2207 |
. 2
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3 | elopab 4188 |
. 2
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4 | 2, 3 | bitri 183 |
1
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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 105 ax-ia2 106 ax-ia3 107 ax-io 699 ax-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1483 ax-10 1484 ax-11 1485 ax-i12 1486 ax-bndl 1487 ax-4 1488 ax-14 1493 ax-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 ax-sep 4054 ax-pow 4106 ax-pr 4139 |
This theorem depends on definitions: df-bi 116 df-3an 965 df-tru 1335 df-nf 1438 df-sb 1737 df-clab 2127 df-cleq 2133 df-clel 2136 df-nfc 2271 df-v 2691 df-un 3080 df-in 3082 df-ss 3089 df-pw 3517 df-sn 3538 df-pr 3539 df-op 3541 df-opab 3998 df-xp 4553 |
This theorem is referenced by: elxp2 4565 0nelxp 4575 0nelelxp 4576 rabxp 4584 elxp3 4601 elvv 4609 elvvv 4610 0xp 4627 xpmlem 4967 elxp4 5034 elxp5 5035 dfco2a 5047 opabex3d 6027 opabex3 6028 xp1st 6071 xp2nd 6072 poxp 6137 xpsnen 6723 xpcomco 6728 xpassen 6732 nqnq0pi 7270 fsum2dlemstep 11235 |
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