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| Mirrors > Home > ILE Home > Th. List > xpexg | 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 |
|---|---|
| xpexg |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xpsspw 4889 |
. 2
| |
| 2 | unexg 4591 |
. . 3
| |
| 3 | pwexg 4319 |
. . 3
| |
| 4 | pwexg 4319 |
. . 3
| |
| 5 | 2, 3, 4 | 3syl 17 |
. 2
|
| 6 | ssexg 4274 |
. 2
| |
| 7 | 1, 5, 6 | sylancr 418 |
1
|
| Colors of variables: wff set class |
| This proof depends on syntax axioms:
|
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4251 ax-pow 4313 ax-pr 4348 ax-un 4580 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-rex 2534 df-v 2823 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-opab 4194 df-xp 4782 |
| This theorem is used by: xpexd 4892 xpex 4893 sqxpexg 4895 resiexg 5111 cnvexg 5328 coexg 5335 fex2 5559 fabexg 5582 resfunexgALT 6341 cofunexg 6342 fnexALT 6344 funexw 6345 opabex3d 6354 opabex3 6355 oprabexd 6364 ofmresex 6374 mpoexxg 6450 tposexg 6533 erex 6835 pmex 6931 mapex 6932 pmvalg 6937 elpmg 6942 fvdiagfn 6979 ixpexgg 7008 ixpsnf1o 7022 map1 7105 xpdom2 7133 xpdom3m 7136 xpen 7149 mapxpen 7152 xpfi 7243 djuex 7389 djuassen 7579 cc2lem 7638 shftfvalg 11605 climconst2 12082 mulgnngzsum 13989 releqgg 14082 eqgex 14083 eqgfval 14084 prdsval 14280 prdsbaslemss 14281 pwsval 14311 pwsbas 14312 dvdsrvald 14509 dvdsrex 14514 aprval 14700 aprap 14707 psrval 15159 psrbasg 15178 psrplusgg 15182 psrlidmfi 15199 lmfval 15419 txbasex 15483 txopn 15491 txcn 15501 txrest 15502 blfvalps 15611 xmetxp 15733 limccnp2lem 15902 limccnp2cntop 15903 dvfvalap 15907 |
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