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| Mirrors > Home > MPE Home > Th. List > xpexg | Structured version Visualization version GIF version | ||
| Description: The Cartesian product of two sets is a set. Proposition 6.2 of [TakeutiZaring] p. 23. See also xpexgALT 7982. (Contributed by NM, 14-Aug-1994.) |
| Ref | Expression |
|---|---|
| xpexg | ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 × 𝐵) ∈ V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xpsspw 5794 | . 2 ⊢ (𝐴 × 𝐵) ⊆ 𝒫 𝒫 (𝐴 ∪ 𝐵) | |
| 2 | unexg 7749 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 ∪ 𝐵) ∈ V) | |
| 3 | pwexg 5347 | . . 3 ⊢ ((𝐴 ∪ 𝐵) ∈ V → 𝒫 (𝐴 ∪ 𝐵) ∈ V) | |
| 4 | pwexg 5347 | . . 3 ⊢ (𝒫 (𝐴 ∪ 𝐵) ∈ V → 𝒫 𝒫 (𝐴 ∪ 𝐵) ∈ V) | |
| 5 | 2, 3, 4 | 3syl 19 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → 𝒫 𝒫 (𝐴 ∪ 𝐵) ∈ V) |
| 6 | ssexg 5288 | . 2 ⊢ (((𝐴 × 𝐵) ⊆ 𝒫 𝒫 (𝐴 ∪ 𝐵) ∧ 𝒫 𝒫 (𝐴 ∪ 𝐵) ∈ V) → (𝐴 × 𝐵) ∈ V) | |
| 7 | 1, 5, 6 | sylancr 599 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 × 𝐵) ∈ V) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 ∈ wcel 2145 Vcvv 3453 ∪ cun 3900 ⊆ wss 3902 𝒫 cpw 4560 × cxp 5657 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2734 ax-sep 5255 ax-pow 5334 ax-pr 5402 ax-un 7740 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2741 df-cleq 2754 df-clel 2837 df-ral 3079 df-rex 3089 df-rab 3415 df-v 3455 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-opab 5172 df-xp 5665 df-rel 5666 |
| This theorem is used by: xpexd 7754 3xpexg 7755 xpex 7756 sqxpexg 7758 coexg 7930 fex2 7937 resfunexgALT 7949 fnexALT 7952 funexw 7953 opabex3d 7966 opabex3rd 7967 opabex3 7968 mpoexxg 8078 fnwelem 8133 naddunif 8686 pmex 8835 pmvalg 8840 elpmg 8846 fvdiagfn 8902 ixpexg 8933 snmapen 9049 xpdom2 9074 xpdom3 9077 omxpen 9081 fodomr 9130 disjenex 9137 domssex2 9139 domssex 9140 mapxpen 9145 fczfsuppd 9360 brwdom2 9549 xpwdomg 9561 unxpwdom2 9564 djuex 9917 djuexALT 9931 fseqen 10034 djuassen 10185 mapdjuen 10187 djudom1 10189 djuinf 10195 hsmexlem2 10433 axdc2lem 10454 iundom2g 10552 fpwwe2lem12 10655 pwsbas 17578 pwsle 17584 pwssca 17588 isga 19424 efgtf 19855 frgpcpbl 19892 frgp0 19893 frgpeccl 19894 frgpadd 19896 frgpmhm 19898 vrgpf 19901 vrgpinv 19902 frgpupf 19906 frgpup1 19908 frgpup2 19909 frgpup3lem 19910 frgpnabllem1 20006 frgpnabllem2 20007 gsum2d2 20107 gsumcom2 20108 dprd2da 20177 pwssplit3 21251 mpofrlmd 21996 frlmip 21997 mattposvs 22683 mat1dimelbas 22699 mdetrlin 22830 lmfval 23463 txbasex 23798 txopn 23834 txrest 23863 txindislem 23865 xkoinjcn 23919 blfvalps 24615 bcthlem1 25558 bcthlem5 25562 rrxip 25624 isvcOLD 31068 resf1o 33209 locfinref 34359 esum2dlem 34610 esum2d 34611 elsx 34713 satfv0 35945 satf00 35961 filnetlem3 37007 filnetlem4 37008 bj-xpexg2 37712 inxpex 39095 xrninxpex 39173 aks6d1c2 43004 relexpxpnnidm 44551 enrelmap 44845 mpoexxg2 49276 eufsn2 49779 |
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