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Mirrors > Home > MPE Home > Th. List > dmexg | Structured version Visualization version GIF version |
Description: The domain of a set is a set. Corollary 6.8(2) of [TakeutiZaring] p. 26. (Contributed by NM, 7-Apr-1995.) |
Ref | Expression |
---|---|
dmexg | ⊢ (𝐴 ∈ 𝑉 → dom 𝐴 ∈ V) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | uniexg 6853 | . 2 ⊢ (𝐴 ∈ 𝑉 → ∪ 𝐴 ∈ V) | |
2 | uniexg 6853 | . 2 ⊢ (∪ 𝐴 ∈ V → ∪ ∪ 𝐴 ∈ V) | |
3 | ssun1 3738 | . . . 4 ⊢ dom 𝐴 ⊆ (dom 𝐴 ∪ ran 𝐴) | |
4 | dmrnssfld 5305 | . . . 4 ⊢ (dom 𝐴 ∪ ran 𝐴) ⊆ ∪ ∪ 𝐴 | |
5 | 3, 4 | sstri 3577 | . . 3 ⊢ dom 𝐴 ⊆ ∪ ∪ 𝐴 |
6 | ssexg 4732 | . . 3 ⊢ ((dom 𝐴 ⊆ ∪ ∪ 𝐴 ∧ ∪ ∪ 𝐴 ∈ V) → dom 𝐴 ∈ V) | |
7 | 5, 6 | mpan 702 | . 2 ⊢ (∪ ∪ 𝐴 ∈ V → dom 𝐴 ∈ V) |
8 | 1, 2, 7 | 3syl 18 | 1 ⊢ (𝐴 ∈ 𝑉 → dom 𝐴 ∈ V) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∈ wcel 1977 Vcvv 3173 ∪ cun 3538 ⊆ wss 3540 ∪ cuni 4372 dom cdm 5038 ran crn 5039 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pr 4833 ax-un 6847 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-rex 2902 df-rab 2905 df-v 3175 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-sn 4126 df-pr 4128 df-op 4132 df-uni 4373 df-br 4584 df-opab 4644 df-cnv 5046 df-dm 5048 df-rn 5049 |
This theorem is referenced by: dmex 6991 iprc 6993 exse2 6998 xpexr2 7000 xpexcnv 7001 soex 7002 cnvexg 7005 coexg 7010 dmfex 7017 cofunexg 7023 offval3 7053 suppval 7184 funsssuppss 7208 suppss 7212 suppssov1 7214 suppssfv 7218 tposexg 7253 tfrlem12 7372 tfrlem13 7373 erexb 7654 f1vrnfibi 8134 oion 8324 unxpwdom2 8376 wemapwe 8477 imadomg 9237 fpwwe2lem3 9334 fpwwe2lem12 9342 fpwwe2lem13 9343 hashfn 13025 fundmge2nop0 13129 fun2dmnop0 13131 trclexlem 13581 relexp0g 13610 relexpsucnnr 13613 o1of2 14191 prdsplusg 15941 prdsmulr 15942 prdsvsca 15943 prdshom 15950 isofn 16258 ssclem 16302 ssc2 16305 ssctr 16308 subsubc 16336 resf1st 16377 resf2nd 16378 funcres 16379 efgrcl 17951 dprddomprc 18222 dprdval0prc 18224 dprdgrp 18227 dprdf 18228 dprdssv 18238 subgdmdprd 18256 dprd2da 18264 f1lindf 19980 decpmatval0 20388 pmatcollpw3lem 20407 ordtbaslem 20802 ordtuni 20804 ordtbas2 20805 ordtbas 20806 ordttopon 20807 ordtopn1 20808 ordtopn2 20809 ordtrest2lem 20817 ordtrest2 20818 txindislem 21246 ordthmeolem 21414 ptcmplem2 21667 tuslem 21881 mbfmulc2re 23221 mbfneg 23223 dvnff 23492 dchrptlem3 24791 structgrssvtxlem 25700 fiusgraedgfi 25936 sizeusglecusg 26014 wlks 26047 wlkres 26050 trls 26066 crcts 26150 cycls 26151 vdusgraval 26434 vdgrnn0pnf 26436 hashnbgravdg 26440 usgravd0nedg 26445 iseupa 26492 vdgn0frgrav2 26551 vdgn1frgrav2 26553 vdgfrgragt2 26554 gsummpt2d 29112 ofcfval3 29491 braew 29632 omsval 29682 sibfof 29729 sitmcl 29740 cndprobval 29822 bdayval 31045 bdayfo 31074 tailf 31540 tailfb 31542 ismgmOLD 32819 rclexi 36941 rtrclexlem 36942 trclubgNEW 36944 cnvrcl0 36951 dfrtrcl5 36955 relexpmulg 37021 relexp01min 37024 relexpxpmin 37028 unidmex 38242 dmexd 38417 caragenval 39383 omecl 39393 caragenunidm 39398 opabn1stprc 40318 vtxdgf 40686 offval0 42093 |
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