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| Description: The cross product of two sets is a set. Proposition 6.2 of [TakeutiZaring] p. 23. |
| Ref | Expression |
|---|---|
| xpex.1 |
|
| xpex.2 |
|
| Ref | Expression |
|---|---|
| xpex |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xpex.1 |
. 2
| |
| 2 | xpex.2 |
. 2
| |
| 3 | xpexg 4095 |
. 2
| |
| 4 | 1, 2, 3 | mp2an 761 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: oprabex 4948 oprabex3 4951 oprvexOLDOLD 4974 elpm 5395 map0 5403 map1 5489 xpsnen 5494 endisj 5496 xpcomen 5498 xpassen 5500 xpdom2 5501 xpdom3 5504 xpen 5582 mapxpen 5589 xpmapenlem5 5594 xpfi 5632 rankxpl 5821 rankxplim 5823 rankxplim2 5824 rankxplim3 5825 rankxpsuc 5826 aceq3 5895 aceq5lem2 5898 aceq5lem3 5899 weth 5949 unxpdomlem 5995 unxpdom2 5997 sucxpdom 5998 uncdadom 6069 cdaassen 6080 xpcdaen 6081 mapcdaen 6082 cdadom1 6083 enqex 6200 nqex 6201 enrex 6330 srex 6331 axcnex 6419 addex 6470 mulex 6471 exp1 7816 expp1 7817 serz0 8313 serzcmp0 8315 climconst2 8355 climconst3 8356 climuz0i 8368 climaddc1 8378 climmulc2 8389 climsubc2 8391 climcmpc1 8399 iserzcmp0 8403 ser1consti 8431 acdc3lem 8754 acdc4lem1 8756 acdclem 8763 xpnnen 8768 xpomen 8769 qnnen 8772 ruclem9 8787 infxpidmlem1 8821 infxpidmlem9 8829 infxpidmlem10 8830 infxpidmlem12 8832 infmap1 8842 iunctb 8844 infmap2lem2 8849 infmap2 8850 txbas 8933 ismeti 9079 metxp 9111 lmclim 9241 metelcls 9243 bcthlem12 9288 bcthlem15 9291 bcthlem30 9306 isgrpi 9322 isgrp2i 9360 gx1 9385 gxnn0suc 9387 vcoprne 9530 vacnlem4 9670 sspval 9721 0ofval 9787 ajfval 9809 hvmulex 10513 hlim0 10738 hlimcaui 10740 hlimunii 10742 opsqrlem2 11712 opsqrlem3 11713 opsqrlem5 11715 algrf 13739 algr0 13740 algrp1 13742 eucalgcvga 13754 eucalg 13755 mulgcdlem2 13757 mulgcdlem5 13760 lteqtpos 15024 dualded 15132 issubcat 15193 fictb 15371 2ndcctbss 15478 txsubsp 15912 txmet 15925 heiborlem40 15994 bfplem1 15998 bfplem2 15999 bfplem3 16000 ismrer1 16024 phtpcval 16058 pcorev 16087 pi1gp 16095 cmtfval 16937 cvrfval 16987 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 1304 ax-gen 1305 ax-8 1306 ax-9 1307 ax-10 1308 ax-11 1309 ax-12 1310 ax-13 1311 ax-14 1312 ax-17 1317 ax-4 1319 ax-5o 1321 ax-6o 1324 ax-9o 1481 ax-10o 1500 ax-16 1580 ax-11o 1588 ax-ext 1865 ax-sep 3438 ax-nul 3445 ax-pow 3481 ax-pr 3524 ax-un 3790 |
| This theorem depends on definitions: df-bi 164 df-or 241 df-an 242 df-ex 1327 df-sb 1536 df-eu 1775 df-mo 1776 df-clab 1872 df-cleq 1877 df-clel 1880 df-ne 2019 df-rex 2110 df-v 2294 df-dif 2597 df-un 2600 df-in 2603 df-ss 2605 df-nul 2876 df-pw 3035 df-sn 3049 df-pr 3050 df-op 3053 df-uni 3178 df-opab 3396 df-xp 4000 df-rel 4001 |