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Mirrors > Home > ILE Home > Th. List > xpmlem | Unicode version |
Description: The cross product of inhabited classes is inhabited. (Contributed by Jim Kingdon, 11-Dec-2018.) |
Ref | Expression |
---|---|
xpmlem |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eeanv 1932 |
. . 3
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2 | vex 2741 |
. . . . . 6
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3 | vex 2741 |
. . . . . 6
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4 | 2, 3 | opex 4230 |
. . . . 5
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5 | eleq1 2240 |
. . . . . 6
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6 | opelxp 4657 |
. . . . . 6
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7 | 5, 6 | bitrdi 196 |
. . . . 5
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8 | 4, 7 | spcev 2833 |
. . . 4
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9 | 8 | exlimivv 1896 |
. . 3
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10 | 1, 9 | sylbir 135 |
. 2
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11 | elxp 4644 |
. . . . 5
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12 | simpr 110 |
. . . . . 6
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13 | 12 | 2eximi 1601 |
. . . . 5
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14 | 11, 13 | sylbi 121 |
. . . 4
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15 | 14 | exlimiv 1598 |
. . 3
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16 | 15, 1 | sylib 122 |
. 2
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17 | 10, 16 | impbii 126 |
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 106 ax-ia2 107 ax-ia3 108 ax-io 709 ax-5 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-10 1505 ax-11 1506 ax-i12 1507 ax-bndl 1509 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-i5r 1535 ax-14 2151 ax-ext 2159 ax-sep 4122 ax-pow 4175 ax-pr 4210 |
This theorem depends on definitions: df-bi 117 df-3an 980 df-tru 1356 df-nf 1461 df-sb 1763 df-clab 2164 df-cleq 2170 df-clel 2173 df-nfc 2308 df-ral 2460 df-rex 2461 df-v 2740 df-un 3134 df-in 3136 df-ss 3143 df-pw 3578 df-sn 3599 df-pr 3600 df-op 3602 df-opab 4066 df-xp 4633 |
This theorem is referenced by: xpm 5051 |
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