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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 7993. (Contributed by NM, 14-Aug-1994.) |
| Ref | Expression |
|---|---|
| xpexg | ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 × 𝐵) ∈ V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xpsspw 5786 | . 2 ⊢ (𝐴 × 𝐵) ⊆ 𝒫 𝒫 (𝐴 ∪ 𝐵) | |
| 2 | unexg 7760 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 ∪ 𝐵) ∈ V) | |
| 3 | pwexg 5339 | . . 3 ⊢ ((𝐴 ∪ 𝐵) ∈ V → 𝒫 (𝐴 ∪ 𝐵) ∈ V) | |
| 4 | pwexg 5339 | . . 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 5280 | . 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 2144 Vcvv 3450 ⊆ wss 3895 ∪ cun 4149 𝒫 cpw 4556 × cxp 5648 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 ax-sep 5248 ax-pow 5326 ax-pr 5390 ax-un 7751 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-opab 5167 df-xp 5656 df-rel 5657 |
| This theorem is used by: xpexd 7765 3xpexg 7766 xpex 7767 sqxpexg 7769 coexg 7941 fex2 7948 resfunexgALT 7960 fnexALT 7963 funexw 7964 opabex3d 7977 opabex3rd 7978 opabex3 7979 mpoexxg 8088 fnwelem 8143 naddunif 8704 pmex 8853 pmvalg 8858 elpmg 8864 fvdiagfn 8920 ixpexg 8951 snmapen 9067 xpdom2 9092 xpdom3 9095 omxpen 9099 fodomr 9148 disjenex 9155 domssex2 9157 domssex 9158 mapxpen 9163 fczfsuppd 9379 brwdom2 9568 xpwdomg 9580 unxpwdom2 9583 djuex 9990 djuexALT 10004 fseqen 10107 djuassen 10258 mapdjuen 10260 djudom1 10262 djuinf 10268 hsmexlem2 10506 axdc2lem 10527 iundom2g 10625 fpwwe2lem12 10728 pwsbas 17659 pwsle 17665 pwssca 17669 isga 19506 efgtf 19937 frgpcpbl 19974 frgp0 19975 frgpeccl 19976 frgpadd 19978 frgpmhm 19980 vrgpf 19983 vrgpinv 19984 frgpupf 19988 frgpup1 19990 frgpup2 19991 frgpup3lem 19992 frgpnabllem1 20088 frgpnabllem2 20089 gsum2d2 20189 gsumcom2 20190 dprd2da 20259 pwssplit3 21337 mpofrlmd 22084 frlmip 22085 mattposvs 22771 mat1dimelbas 22787 mdetrlin 22918 lmfval 23551 txbasex 23886 txopn 23922 txrest 23951 txindislem 23953 xkoinjcn 24007 blfvalps 24703 bcthlem1 25646 bcthlem5 25650 rrxip 25712 isvcOLD 31182 resf1o 33365 locfinref 34516 esum2dlem 34767 esum2d 34768 elsx 34870 satfv0 36192 satf00 36208 filnetlem3 37243 filnetlem4 37244 bj-xpexg2 37948 inxpex 39347 xrninxpex 39425 aks6d1c2 43256 relexpxpnnidm 44779 enrelmap 45073 mpoexxg2 49526 eufsn2 50029 |
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