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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 6955 | . 2 ⊢ (𝐴 ∈ 𝑉 → ∪ 𝐴 ∈ V) | |
2 | uniexg 6955 | . 2 ⊢ (∪ 𝐴 ∈ V → ∪ ∪ 𝐴 ∈ V) | |
3 | ssun1 3776 | . . . 4 ⊢ dom 𝐴 ⊆ (dom 𝐴 ∪ ran 𝐴) | |
4 | dmrnssfld 5384 | . . . 4 ⊢ (dom 𝐴 ∪ ran 𝐴) ⊆ ∪ ∪ 𝐴 | |
5 | 3, 4 | sstri 3612 | . . 3 ⊢ dom 𝐴 ⊆ ∪ ∪ 𝐴 |
6 | ssexg 4804 | . . 3 ⊢ ((dom 𝐴 ⊆ ∪ ∪ 𝐴 ∧ ∪ ∪ 𝐴 ∈ V) → dom 𝐴 ∈ V) | |
7 | 5, 6 | mpan 706 | . 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 1990 Vcvv 3200 ∪ cun 3572 ⊆ wss 3574 ∪ cuni 4436 dom cdm 5114 ran crn 5115 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pr 4906 ax-un 6949 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-rex 2918 df-rab 2921 df-v 3202 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 df-sn 4178 df-pr 4180 df-op 4184 df-uni 4437 df-br 4654 df-opab 4713 df-cnv 5122 df-dm 5124 df-rn 5125 |
This theorem is referenced by: dmex 7099 iprc 7101 exse2 7105 xpexr2 7107 xpexcnv 7108 soex 7109 cnvexg 7112 coexg 7117 dmfex 7124 cofunexg 7130 offval3 7162 opabn1stprc 7228 suppval 7297 funsssuppss 7321 suppss 7325 suppssov1 7327 suppssfv 7331 tposexg 7366 tfrlem12 7485 tfrlem13 7486 erexb 7767 f1vrnfibi 8251 oion 8441 unxpwdom2 8493 wemapwe 8594 imadomg 9356 fpwwe2lem3 9455 fpwwe2lem12 9463 fpwwe2lem13 9464 hashfn 13164 hashdmpropge2 13265 fundmge2nop0 13274 fun2dmnop0 13276 trclexlem 13733 relexp0g 13762 relexpsucnnr 13765 o1of2 14343 prdsplusg 16118 prdsmulr 16119 prdsvsca 16120 prdshom 16127 isofn 16435 ssclem 16479 ssc2 16482 ssctr 16485 subsubc 16513 resf1st 16554 resf2nd 16555 funcres 16556 efgrcl 18128 dprddomprc 18399 dprdval0prc 18401 dprdgrp 18404 dprdf 18405 dprdssv 18415 subgdmdprd 18433 dprd2da 18441 f1lindf 20161 decpmatval0 20569 pmatcollpw3lem 20588 ordtbaslem 20992 ordtuni 20994 ordtbas2 20995 ordtbas 20996 ordttopon 20997 ordtopn1 20998 ordtopn2 20999 ordtrest2lem 21007 ordtrest2 21008 txindislem 21436 ordthmeolem 21604 ptcmplem2 21857 tuslem 22071 mbfmulc2re 23415 mbfneg 23417 dvnff 23686 dchrptlem3 24991 structgrssvtxlemOLD 25915 vtxdgf 26367 gsummpt2d 29781 ofcfval3 30164 braew 30305 omsval 30355 sibfof 30402 sitmcl 30413 cndprobval 30495 bdayval 31801 noextend 31819 bdayfo 31828 tailf 32370 tailfb 32372 ismgmOLD 33649 rclexi 37922 rtrclexlem 37923 trclubgNEW 37925 cnvrcl0 37932 dfrtrcl5 37936 relexpmulg 38002 relexp01min 38005 relexpxpmin 38009 unidmex 39217 dmexd 39422 caragenval 40707 omecl 40717 caragenunidm 40722 offval0 42299 |
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