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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 8020. (Contributed by NM, 14-Aug-1994.) |
| Ref | Expression |
|---|---|
| xpexg | ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 × 𝐵) ∈ V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xpsspw 5793 | . 2 ⊢ (𝐴 × 𝐵) ⊆ 𝒫 𝒫 (𝐴 ∪ 𝐵) | |
| 2 | unexg 7787 | . . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 ∪ 𝐵) ∈ V) | |
| 3 | pwexg 5345 | . . 3 ⊢ ((𝐴 ∪ 𝐵) ∈ V → 𝒫 (𝐴 ∪ 𝐵) ∈ V) | |
| 4 | pwexg 5345 | . . 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 5286 | . 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 2147 Vcvv 3454 ⊆ wss 3900 ∪ cun 4152 𝒫 cpw 4560 × cxp 5654 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-ext 2735 ax-sep 5253 ax-pow 5332 ax-pr 5396 ax-un 7778 |
| 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 2102 df-clab 2742 df-cleq 2755 df-clel 2839 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-opab 5172 df-xp 5662 df-rel 5663 |
| This theorem is used by: xpexd 7792 3xpexg 7793 xpex 7794 sqxpexg 7796 coexg 7968 fex2 7975 resfunexgALT 7987 fnexALT 7990 funexw 7991 opabex3d 8004 opabex3rd 8005 opabex3 8006 mpoexxg 8116 fnwelem 8173 naddunif 8734 pmex 8883 pmvalg 8888 elpmg 8894 fvdiagfn 8950 ixpexg 8981 snmapen 9097 xpdom2 9122 xpdom3 9125 omxpen 9129 fodomr 9178 disjenex 9185 domssex2 9187 domssex 9188 mapxpen 9193 fczfsuppd 9408 brwdom2 9597 xpwdomg 9609 unxpwdom2 9612 djuex 10019 djuexALT 10033 fseqen 10136 djuassen 10287 mapdjuen 10289 djudom1 10291 djuinf 10297 hsmexlem2 10535 axdc2lem 10556 iundom2g 10654 fpwwe2lem12 10757 pwsbas 17690 pwsle 17696 pwssca 17700 isga 19538 efgtf 19969 frgpcpbl 20006 frgp0 20007 frgpeccl 20008 frgpadd 20010 frgpmhm 20012 vrgpf 20015 vrgpinv 20016 frgpupf 20020 frgpup1 20022 frgpup2 20023 frgpup3lem 20024 frgpnabllem1 20120 frgpnabllem2 20121 gsum2d2 20221 gsumcom2 20222 dprd2da 20291 pwssplit3 21369 mpofrlmd 22116 frlmip 22117 mattposvs 22803 mat1dimelbas 22819 mdetrlin 22950 lmfval 23583 txbasex 23918 txopn 23954 txrest 23983 txindislem 23985 xkoinjcn 24039 blfvalps 24735 bcthlem1 25678 bcthlem5 25682 rrxip 25744 isvcOLD 31214 resf1o 33395 locfinref 34556 esum2dlem 34807 esum2d 34808 elsx 34910 satfv0 36303 satf00 36319 filnetlem3 37359 filnetlem4 37360 bj-xpexg2 38064 inxpex 39474 xrninxpex 39552 aks6d1c2 43383 relexpxpnnidm 44906 enrelmap 45200 mpoexxg2 49665 eufsn2 50169 |
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