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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 3908 | . . . 4 ⊢ (𝐴 ⊆ 𝐵 → (𝑥 ∈ 𝐴 → 𝑥 ∈ 𝐵)) | |
2 | ssel 3908 | . . . 4 ⊢ (𝐶 ⊆ 𝐷 → (𝑦 ∈ 𝐶 → 𝑦 ∈ 𝐷)) | |
3 | 1, 2 | im2anan9 622 | . . 3 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐶 ⊆ 𝐷) → ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐶) → (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐷))) |
4 | 3 | ssopab2dv 5403 | . 2 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐶 ⊆ 𝐷) → {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐶)} ⊆ {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐷)}) |
5 | df-xp 5525 | . 2 ⊢ (𝐴 × 𝐶) = {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐶)} | |
6 | df-xp 5525 | . 2 ⊢ (𝐵 × 𝐷) = {〈𝑥, 𝑦〉 ∣ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐷)} | |
7 | 4, 5, 6 | 3sstr4g 3960 | 1 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐶 ⊆ 𝐷) → (𝐴 × 𝐶) ⊆ (𝐵 × 𝐷)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 399 ∈ wcel 2111 ⊆ wss 3881 {copab 5092 × cxp 5517 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-ext 2770 |
This theorem depends on definitions: df-bi 210 df-an 400 df-ex 1782 df-sb 2070 df-clab 2777 df-cleq 2791 df-clel 2870 df-v 3443 df-in 3888 df-ss 3898 df-opab 5093 df-xp 5525 |
This theorem is referenced by: xpss 5535 inxpssres 5536 xpss1 5538 xpss2 5539 djussxp 5680 ssxpb 5998 resssxp 6089 cossxp 6091 relrelss 6092 fssxp 6508 oprabss 7239 oprres 7296 fimaproj 7812 pmss12g 8416 marypha1lem 8881 marypha2lem1 8883 hartogslem1 8990 infxpenlem 9424 dfac5lem4 9537 axdc4lem 9866 fpwwe2lem1 10042 fpwwe2lem11 10051 fpwwe2lem12 10052 fpwwe2lem13 10053 canthwe 10062 tskxpss 10183 dmaddpi 10301 dmmulpi 10302 addnqf 10359 mulnqf 10360 rexpssxrxp 10675 ltrelxr 10691 mulnzcnopr 11275 dfz2 11988 elq 12338 leiso 13813 znnen 15557 phimullem 16106 imasless 16805 sscpwex 17077 fullsubc 17112 fullresc 17113 wunfunc 17161 funcres2c 17163 homaf 17282 dmcoass 17318 catcoppccl 17360 catcfuccl 17361 catcxpccl 17449 znleval 20246 txuni2 22170 txbas 22172 txcld 22208 txcls 22209 neitx 22212 txcnp 22225 txlly 22241 txnlly 22242 hausdiag 22250 tx1stc 22255 txkgen 22257 xkococnlem 22264 cnmpt2res 22282 clssubg 22714 tsmsxplem1 22758 tsmsxplem2 22759 tsmsxp 22760 trust 22835 ustuqtop1 22847 psmetres2 22921 xmetres2 22968 metres2 22970 ressprdsds 22978 xmetresbl 23044 ressxms 23132 metustexhalf 23163 cfilucfil 23166 restmetu 23177 nrginvrcn 23298 qtopbaslem 23364 tgqioo 23405 re2ndc 23406 resubmet 23407 xrsdsre 23415 bndth 23563 lebnumii 23571 iscfil2 23870 cmssmscld 23954 cmsss 23955 cmscsscms 23977 minveclem3a 24031 ovolfsf 24075 opnmblALT 24207 mbfimaopnlem 24259 itg1addlem4 24303 limccnp2 24495 taylfval 24954 taylf 24956 dvdsmulf1o 25779 fsumdvdsmul 25780 sspg 28511 ssps 28513 sspmlem 28515 issh2 28992 hhssabloilem 29044 hhssabloi 29045 hhssnv 29047 hhshsslem1 29050 shsel 29097 ofrn2 30401 djussxp2 30410 gtiso 30460 xrofsup 30518 txomap 31187 tpr2rico 31265 prsss 31269 raddcn 31282 xrge0pluscn 31293 br2base 31637 dya2iocnrect 31649 dya2iocucvr 31652 eulerpartlemgh 31746 eulerpartlemgs2 31748 cvmlift2lem9 32671 cvmlift2lem10 32672 cvmlift2lem11 32673 cvmlift2lem12 32674 mpstssv 32899 elxp8 34788 mblfinlem2 35095 ftc1anc 35138 ssbnd 35226 prdsbnd2 35233 cnpwstotbnd 35235 reheibor 35277 exidreslem 35315 divrngcl 35395 isdrngo2 35396 dibss 38465 xppss12 39409 arearect 40165 rtrclex 40317 rtrclexi 40321 rr2sscn2 41998 fourierdlem42 42791 opnvonmbllem2 43272 rnghmresfn 44587 rnghmsscmap2 44597 rnghmsscmap 44598 rhmresfn 44633 rhmsscmap2 44643 rhmsscmap 44644 rhmsscrnghm 44650 rngcrescrhm 44709 rngcrescrhmALTV 44727 |
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