| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 5787 | . 2 ⊢ (𝐴 × 𝐵) ⊆ 𝒫 𝒫 (𝐴 ∪ 𝐵) | |
| 2 | unexg 7749 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 ∪ 𝐵) ∈ V) | |
| 3 | pwexg 5340 | . . 3 ⊢ ((𝐴 ∪ 𝐵) ∈ V → 𝒫 (𝐴 ∪ 𝐵) ∈ V) | |
| 4 | pwexg 5340 | . . 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 5281 | . 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 3451 ∪ cun 3897 ⊆ wss 3899 𝒫 cpw 4557 × cxp 5649 |
| 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 2733 ax-sep 5249 ax-pow 5327 ax-pr 5391 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 2740 df-cleq 2753 df-clel 2836 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-opab 5168 df-xp 5657 df-rel 5658 |
| 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 8077 fnwelem 8132 naddunif 8687 pmex 8836 pmvalg 8841 elpmg 8847 fvdiagfn 8903 ixpexg 8934 snmapen 9050 xpdom2 9075 xpdom3 9078 omxpen 9082 fodomr 9131 disjenex 9138 domssex2 9140 domssex 9141 mapxpen 9146 fczfsuppd 9362 brwdom2 9551 xpwdomg 9563 unxpwdom2 9566 djuex 9970 djuexALT 9984 fseqen 10087 djuassen 10238 mapdjuen 10240 djudom1 10242 djuinf 10248 hsmexlem2 10486 axdc2lem 10507 iundom2g 10605 fpwwe2lem12 10708 pwsbas 17638 pwsle 17644 pwssca 17648 isga 19485 efgtf 19916 frgpcpbl 19953 frgp0 19954 frgpeccl 19955 frgpadd 19957 frgpmhm 19959 vrgpf 19962 vrgpinv 19963 frgpupf 19967 frgpup1 19969 frgpup2 19970 frgpup3lem 19971 frgpnabllem1 20067 frgpnabllem2 20068 gsum2d2 20168 gsumcom2 20169 dprd2da 20238 pwssplit3 21316 mpofrlmd 22063 frlmip 22064 mattposvs 22750 mat1dimelbas 22766 mdetrlin 22897 lmfval 23530 txbasex 23865 txopn 23901 txrest 23930 txindislem 23932 xkoinjcn 23986 blfvalps 24682 bcthlem1 25625 bcthlem5 25629 rrxip 25691 isvcOLD 31163 resf1o 33304 locfinref 34455 esum2dlem 34706 esum2d 34707 elsx 34809 satfv0 36092 satf00 36108 filnetlem3 37138 filnetlem4 37139 bj-xpexg2 37843 inxpex 39239 xrninxpex 39317 aks6d1c2 43148 relexpxpnnidm 44662 enrelmap 44956 mpoexxg2 49394 eufsn2 49897 |
| Copyright terms: Public domain | W3C validator |