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Mirrors > Home > MPE Home > Th. List > xpss12 | Structured version Visualization version GIF version |
Description: Subset theorem for Cartesian product. Generalization of Theorem 101 of [Suppes] p. 52. (Contributed by NM, 26-Aug-1995.) (Proof shortened by Andrew Salmon, 27-Aug-2011.) |
Ref | Expression |
---|---|
xpss12 | ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐶 ⊆ 𝐷) → (𝐴 × 𝐶) ⊆ (𝐵 × 𝐷)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ssel 3964 | . . . 4 ⊢ (𝐴 ⊆ 𝐵 → (𝑥 ∈ 𝐴 → 𝑥 ∈ 𝐵)) | |
2 | ssel 3964 | . . . 4 ⊢ (𝐶 ⊆ 𝐷 → (𝑦 ∈ 𝐶 → 𝑦 ∈ 𝐷)) | |
3 | 1, 2 | im2anan9 621 | . . 3 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐶 ⊆ 𝐷) → ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐶) → (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐷))) |
4 | 3 | ssopab2dv 5441 | . 2 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐶 ⊆ 𝐷) → {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐶)} ⊆ {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐷)}) |
5 | df-xp 5564 | . 2 ⊢ (𝐴 × 𝐶) = {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐶)} | |
6 | df-xp 5564 | . 2 ⊢ (𝐵 × 𝐷) = {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐷)} | |
7 | 4, 5, 6 | 3sstr4g 4015 | 1 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐶 ⊆ 𝐷) → (𝐴 × 𝐶) ⊆ (𝐵 × 𝐷)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 ∈ wcel 2113 ⊆ wss 3939 {copab 5131 × cxp 5556 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1969 ax-7 2014 ax-8 2115 ax-9 2123 ax-10 2144 ax-11 2160 ax-12 2176 ax-ext 2796 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-tru 1539 df-ex 1780 df-nf 1784 df-sb 2069 df-clab 2803 df-cleq 2817 df-clel 2896 df-nfc 2966 df-in 3946 df-ss 3955 df-opab 5132 df-xp 5564 |
This theorem is referenced by: xpss 5574 inxpssres 5575 xpss1 5577 xpss2 5578 djussxp 5719 ssxpb 6034 cossxp 6126 relrelss 6127 fssxp 6537 oprabss 7263 oprres 7319 fimaproj 7832 pmss12g 8436 marypha1lem 8900 marypha2lem1 8902 hartogslem1 9009 infxpenlem 9442 dfac5lem4 9555 axdc4lem 9880 fpwwe2lem1 10056 fpwwe2lem11 10065 fpwwe2lem12 10066 fpwwe2lem13 10067 canthwe 10076 tskxpss 10197 dmaddpi 10315 dmmulpi 10316 addnqf 10373 mulnqf 10374 rexpssxrxp 10689 ltrelxr 10705 mulnzcnopr 11289 dfz2 12003 elq 12353 leiso 13820 znnen 15568 phimullem 16119 imasless 16816 sscpwex 17088 fullsubc 17123 fullresc 17124 wunfunc 17172 funcres2c 17174 homaf 17293 dmcoass 17329 catcoppccl 17371 catcfuccl 17372 catcxpccl 17460 znleval 20704 txuni2 22176 txbas 22178 txcld 22214 txcls 22215 neitx 22218 txcnp 22231 txlly 22247 txnlly 22248 hausdiag 22256 tx1stc 22261 txkgen 22263 xkococnlem 22270 cnmpt2res 22288 clssubg 22720 tsmsxplem1 22764 tsmsxplem2 22765 tsmsxp 22766 trust 22841 ustuqtop1 22853 psmetres2 22927 xmetres2 22974 metres2 22976 ressprdsds 22984 xmetresbl 23050 ressxms 23138 metustexhalf 23169 cfilucfil 23172 restmetu 23183 nrginvrcn 23304 qtopbaslem 23370 tgqioo 23411 re2ndc 23412 resubmet 23413 xrsdsre 23421 bndth 23565 lebnumii 23573 iscfil2 23872 cmssmscld 23956 cmsss 23957 cmscsscms 23979 minveclem3a 24033 ovolfsf 24075 opnmblALT 24207 mbfimaopnlem 24259 itg1addlem4 24303 limccnp2 24493 taylfval 24950 taylf 24952 dvdsmulf1o 25774 fsumdvdsmul 25775 sspg 28508 ssps 28510 sspmlem 28512 issh2 28989 hhssabloilem 29041 hhssabloi 29042 hhssnv 29044 hhshsslem1 29047 shsel 29094 ofrn2 30390 gtiso 30439 xrofsup 30495 txomap 31102 tpr2rico 31159 prsss 31163 raddcn 31176 xrge0pluscn 31187 br2base 31531 dya2iocnrect 31543 dya2iocucvr 31546 eulerpartlemgh 31640 eulerpartlemgs2 31642 cvmlift2lem9 32562 cvmlift2lem10 32563 cvmlift2lem11 32564 cvmlift2lem12 32565 mpstssv 32790 elxp8 34656 mblfinlem2 34934 ftc1anc 34979 ssbnd 35070 prdsbnd2 35077 cnpwstotbnd 35079 reheibor 35121 exidreslem 35159 divrngcl 35239 isdrngo2 35240 dibss 38309 xppss12 39121 arearect 39828 rtrclex 39983 rtrclexi 39987 rp-imass 40123 rr2sscn2 41640 fourierdlem42 42441 opnvonmbllem2 42922 rnghmresfn 44241 rnghmsscmap2 44251 rnghmsscmap 44252 rhmresfn 44287 rhmsscmap2 44297 rhmsscmap 44298 rhmsscrnghm 44304 rngcrescrhm 44363 rngcrescrhmALTV 44381 |
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