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| Mirrors > Home > ILE Home > Th. List > xpex | Unicode version | ||
| Description: The cross product of two sets is a set. Proposition 6.2 of [TakeutiZaring] p. 23. (Contributed by NM, 14-Aug-1994.) |
| Ref | Expression |
|---|---|
| xpex.1 |
|
| xpex.2 |
|
| Ref | Expression |
|---|---|
| xpex |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xpex.1 |
. 2
| |
| 2 | xpex.2 |
. 2
| |
| 3 | xpexg 4833 |
. 2
| |
| 4 | 1, 2, 3 | mp2an 426 |
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 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-sep 4202 ax-pow 4258 ax-pr 4293 ax-un 4524 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-rex 2514 df-v 2801 df-un 3201 df-in 3203 df-ss 3210 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3889 df-opab 4146 df-xp 4725 |
| This theorem is referenced by: oprabex 6279 oprabex3 6280 mpoexw 6365 fnpm 6811 mapsnf1o2 6851 xpsnen 6988 endisj 6991 xpcomen 6994 xpassen 6997 xpmapenlem 7018 0ct 7285 exmidomni 7320 exmidfodomrlemim 7390 2omotaplemst 7455 enqex 7558 nqex 7561 enq0ex 7637 nq0ex 7638 npex 7671 enrex 7935 addvalex 8042 axcnex 8057 addex 9859 mulex 9860 ixxex 10107 fxnn0nninf 10673 inftonninf 10676 shftfval 11347 nninfct 12577 qnumval 12722 qdenval 12723 qnnen 13017 prdsex 13317 metuex 14534 cnfldstr 14537 cnfldle 14546 znval 14615 znle 14616 znbaslemnn 14618 fnpsr 14646 txuni2 14945 txbas 14947 eltx 14948 txcnp 14960 txcnmpt 14962 txrest 14965 txlm 14968 reldvg 15368 |
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