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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 7994. (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 7761 | . . 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 7752 |
| 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 4585 df-pr 4587 df-op 4835 df-uni 4867 df-opab 5167 df-xp 5656 df-rel 5657 |
| This theorem is used by: xpexd 7766 3xpexg 7767 xpex 7768 sqxpexg 7770 coexg 7942 fex2 7949 resfunexgALT 7961 fnexALT 7964 funexw 7965 opabex3d 7978 opabex3rd 7979 opabex3 7980 mpoexxg 8089 fnwelem 8146 naddunif 8707 pmex 8856 pmvalg 8861 elpmg 8867 fvdiagfn 8923 ixpexg 8954 snmapen 9070 xpdom2 9095 xpdom3 9098 omxpen 9102 fodomr 9151 disjenex 9158 domssex2 9160 domssex 9161 mapxpen 9166 fczfsuppd 9382 brwdom2 9571 xpwdomg 9583 unxpwdom2 9586 djuex 9993 djuexALT 10007 fseqen 10110 djuassen 10261 mapdjuen 10263 djudom1 10265 djuinf 10271 hsmexlem2 10509 axdc2lem 10530 iundom2g 10628 fpwwe2lem12 10731 pwsbas 17664 pwsle 17670 pwssca 17674 isga 19511 efgtf 19942 frgpcpbl 19979 frgp0 19980 frgpeccl 19981 frgpadd 19983 frgpmhm 19985 vrgpf 19988 vrgpinv 19989 frgpupf 19993 frgpup1 19995 frgpup2 19996 frgpup3lem 19997 frgpnabllem1 20093 frgpnabllem2 20094 gsum2d2 20194 gsumcom2 20195 dprd2da 20264 pwssplit3 21342 mpofrlmd 22089 frlmip 22090 mattposvs 22776 mat1dimelbas 22792 mdetrlin 22923 lmfval 23556 txbasex 23891 txopn 23927 txrest 23956 txindislem 23958 xkoinjcn 24012 blfvalps 24708 bcthlem1 25651 bcthlem5 25655 rrxip 25717 isvcOLD 31187 resf1o 33369 locfinref 34520 esum2dlem 34771 esum2d 34772 elsx 34874 satfv0 36210 satf00 36226 filnetlem3 37261 filnetlem4 37262 bj-xpexg2 37966 inxpex 39365 xrninxpex 39443 aks6d1c2 43274 relexpxpnnidm 44797 enrelmap 45091 mpoexxg2 49544 eufsn2 50048 |
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