![]() |
Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
|
Mirrors > Home > MPE Home > Th. List > dmss | Structured version Visualization version GIF version |
Description: Subset theorem for domain. (Contributed by NM, 11-Aug-1994.) |
Ref | Expression |
---|---|
dmss | ⊢ (𝐴 ⊆ 𝐵 → dom 𝐴 ⊆ dom 𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ssel 3908 | . . . 4 ⊢ (𝐴 ⊆ 𝐵 → (〈𝑥, 𝑦〉 ∈ 𝐴 → 〈𝑥, 𝑦〉 ∈ 𝐵)) | |
2 | 1 | eximdv 1918 | . . 3 ⊢ (𝐴 ⊆ 𝐵 → (∃𝑦〈𝑥, 𝑦〉 ∈ 𝐴 → ∃𝑦〈𝑥, 𝑦〉 ∈ 𝐵)) |
3 | vex 3444 | . . . 4 ⊢ 𝑥 ∈ V | |
4 | 3 | eldm2 5734 | . . 3 ⊢ (𝑥 ∈ dom 𝐴 ↔ ∃𝑦〈𝑥, 𝑦〉 ∈ 𝐴) |
5 | 3 | eldm2 5734 | . . 3 ⊢ (𝑥 ∈ dom 𝐵 ↔ ∃𝑦〈𝑥, 𝑦〉 ∈ 𝐵) |
6 | 2, 4, 5 | 3imtr4g 299 | . 2 ⊢ (𝐴 ⊆ 𝐵 → (𝑥 ∈ dom 𝐴 → 𝑥 ∈ dom 𝐵)) |
7 | 6 | ssrdv 3921 | 1 ⊢ (𝐴 ⊆ 𝐵 → dom 𝐴 ⊆ dom 𝐵) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∃wex 1781 ∈ wcel 2111 ⊆ wss 3881 〈cop 4531 dom cdm 5519 |
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-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-v 3443 df-un 3886 df-in 3888 df-ss 3898 df-sn 4526 df-pr 4528 df-op 4532 df-br 5031 df-dm 5529 |
This theorem is referenced by: dmeq 5736 dmv 5756 rnss 5773 dmiin 5789 ssxpb 5998 sofld 6011 resssxp 6089 relrelss 6092 funssxp 6509 fndmdif 6789 fneqeql2 6794 dff3 6843 frxp 7803 fnwelem 7808 funsssuppss 7839 tposss 7876 wfrlem16 7953 smores 7972 smores2 7974 tfrlem13 8009 imafi 8801 hartogslem1 8990 wemapso 8999 r0weon 9423 infxpenlem 9424 brdom3 9939 brdom5 9940 brdom4 9941 fpwwe2lem13 10053 fpwwe2 10054 canth4 10058 canthwelem 10061 pwfseqlem4 10073 nqerf 10341 dmrecnq 10379 uzrdgfni 13321 hashdmpropge2 13837 dmtrclfv 14369 rlimpm 14849 isstruct2 16485 strleun 16583 imasaddfnlem 16793 imasvscafn 16802 isohom 17038 catcoppccl 17360 tsrss 17825 ledm 17826 dirdm 17836 f1omvdmvd 18563 mvdco 18565 f1omvdconj 18566 pmtrfb 18585 pmtrfconj 18586 symggen 18590 symggen2 18591 pmtrdifellem1 18596 pmtrdifellem2 18597 psgnunilem1 18613 gsum2d 19085 lspextmo 19821 dsmmfi 20427 lindfres 20512 mdetdiaglem 21203 tsmsxp 22760 ustssco 22820 setsmstopn 23085 metustexhalf 23163 tngtopn 23256 equivcau 23904 metsscmetcld 23919 dvbssntr 24503 pserdv 25024 subgreldmiedg 27073 hlimcaui 29019 nfpconfp 30391 symgcom2 30778 pmtrcnel 30783 pmtrcnel2 30784 pmtrcnelor 30785 cycpmrn 30835 metideq 31246 esum2d 31462 subgrwlk 32492 fundmpss 33122 frrlem8 33243 frrlem14 33249 fixssdm 33480 filnetlem3 33841 filnetlem4 33842 ssbnd 35226 bnd2lem 35229 ismrcd1 39639 istopclsd 39641 mptrcllem 40313 cnvrcl0 40325 dmtrcl 40327 dfrcl2 40375 relexpss1d 40406 rfovcnvf1od 40705 fourierdlem80 42828 issmflem 43361 |
Copyright terms: Public domain | W3C validator |