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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 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eeanv 1960 |
. . 3
| |
| 2 | vex 2775 |
. . . . . 6
| |
| 3 | vex 2775 |
. . . . . 6
| |
| 4 | 2, 3 | opex 4273 |
. . . . 5
|
| 5 | eleq1 2268 |
. . . . . 6
| |
| 6 | opelxp 4705 |
. . . . . 6
| |
| 7 | 5, 6 | bitrdi 196 |
. . . . 5
|
| 8 | 4, 7 | spcev 2868 |
. . . 4
|
| 9 | 8 | exlimivv 1920 |
. . 3
|
| 10 | 1, 9 | sylbir 135 |
. 2
|
| 11 | elxp 4692 |
. . . . 5
| |
| 12 | simpr 110 |
. . . . . 6
| |
| 13 | 12 | 2eximi 1624 |
. . . . 5
|
| 14 | 11, 13 | sylbi 121 |
. . . 4
|
| 15 | 14 | exlimiv 1621 |
. . 3
|
| 16 | 15, 1 | sylib 122 |
. 2
|
| 17 | 10, 16 | impbii 126 |
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 711 ax-5 1470 ax-7 1471 ax-gen 1472 ax-ie1 1516 ax-ie2 1517 ax-8 1527 ax-10 1528 ax-11 1529 ax-i12 1530 ax-bndl 1532 ax-4 1533 ax-17 1549 ax-i9 1553 ax-ial 1557 ax-i5r 1558 ax-14 2179 ax-ext 2187 ax-sep 4162 ax-pow 4218 ax-pr 4253 |
| This theorem depends on definitions: df-bi 117 df-3an 983 df-tru 1376 df-nf 1484 df-sb 1786 df-clab 2192 df-cleq 2198 df-clel 2201 df-nfc 2337 df-ral 2489 df-rex 2490 df-v 2774 df-un 3170 df-in 3172 df-ss 3179 df-pw 3618 df-sn 3639 df-pr 3640 df-op 3642 df-opab 4106 df-xp 4681 |
| This theorem is referenced by: xpm 5104 |
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