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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 4838 |
. 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 4205 ax-pow 4262 ax-pr 4297 ax-un 4528 |
| 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 2802 df-un 3202 df-in 3204 df-ss 3211 df-pw 3652 df-sn 3673 df-pr 3674 df-op 3676 df-uni 3892 df-opab 4149 df-xp 4729 |
| This theorem is referenced by: oprabex 6285 oprabex3 6286 mpoexw 6373 fnpm 6820 mapsnf1o2 6860 xpsnen 7000 endisj 7003 xpcomen 7006 xpassen 7009 xpmapenlem 7030 0ct 7297 exmidomni 7332 exmidfodomrlemim 7402 2omotaplemst 7467 enqex 7570 nqex 7573 enq0ex 7649 nq0ex 7650 npex 7683 enrex 7947 addvalex 8054 axcnex 8069 addex 9876 mulex 9877 ixxex 10124 fxnn0nninf 10691 inftonninf 10694 shftfval 11372 nninfct 12602 qnumval 12747 qdenval 12748 qnnen 13042 prdsex 13342 metuex 14559 cnfldstr 14562 cnfldle 14571 znval 14640 znle 14641 znbaslemnn 14643 fnpsr 14671 txuni2 14970 txbas 14972 eltx 14973 txcnp 14985 txcnmpt 14987 txrest 14990 txlm 14993 reldvg 15393 |
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