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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 7446 | . 2 ⊢ (𝐴 ∈ 𝑉 → ∪ 𝐴 ∈ V) | |
2 | uniexg 7446 | . 2 ⊢ (∪ 𝐴 ∈ V → ∪ ∪ 𝐴 ∈ V) | |
3 | ssun1 4099 | . . . 4 ⊢ dom 𝐴 ⊆ (dom 𝐴 ∪ ran 𝐴) | |
4 | dmrnssfld 5806 | . . . 4 ⊢ (dom 𝐴 ∪ ran 𝐴) ⊆ ∪ ∪ 𝐴 | |
5 | 3, 4 | sstri 3924 | . . 3 ⊢ dom 𝐴 ⊆ ∪ ∪ 𝐴 |
6 | ssexg 5191 | . . 3 ⊢ ((dom 𝐴 ⊆ ∪ ∪ 𝐴 ∧ ∪ ∪ 𝐴 ∈ V) → dom 𝐴 ∈ V) | |
7 | 5, 6 | mpan 689 | . 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 2111 Vcvv 3441 ∪ cun 3879 ⊆ wss 3881 ∪ cuni 4800 dom cdm 5519 ran crn 5520 |
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 ax-sep 5167 ax-nul 5174 ax-pr 5295 ax-un 7441 |
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-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-rab 3115 df-v 3443 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-nul 4244 df-if 4426 df-sn 4526 df-pr 4528 df-op 4532 df-uni 4801 df-br 5031 df-opab 5093 df-cnv 5527 df-dm 5529 df-rn 5530 |
This theorem is referenced by: dmexd 7596 dmex 7598 iprc 7600 exse2 7604 xpexr2 7606 xpexcnv 7607 soex 7608 cnvexg 7611 coexg 7616 dmfex 7623 cofunexg 7632 offval3 7665 opabn1stprc 7738 suppval 7815 funsssuppss 7839 suppss 7843 suppssov1 7845 suppssfv 7849 tposexg 7889 tfrlem12 8008 tfrlem13 8009 erexb 8297 f1vrnfibi 8793 oion 8984 fpwwe2lem3 10044 hashfn 13732 fundmge2nop0 13846 fun2dmnop0 13848 trclexlem 14345 relexp0g 14373 relexpsucnnr 14376 o1of2 14961 isofn 17037 ssclem 17081 ssc2 17084 ssctr 17087 subsubc 17115 resf1st 17156 resf2nd 17157 funcres 17158 dprddomprc 19115 dprdval0prc 19117 subgdmdprd 19149 dprd2da 19157 decpmatval0 21369 pmatcollpw3lem 21388 ordtbaslem 21793 ordtuni 21795 ordtbas2 21796 ordtbas 21797 ordttopon 21798 ordtopn1 21799 ordtopn2 21800 txindislem 22238 ordthmeolem 22406 ptcmplem2 22658 tuslem 22873 dvnff 24526 vtxdgf 27261 suppiniseg 30446 fdifsuppconst 30449 ressupprn 30450 ofcfval3 31471 braew 31611 omsval 31661 sibfof 31708 sitmcl 31719 cndprobval 31801 hashfundm 32464 hashf1dmrn 32465 bdayval 33268 noextend 33286 bdayfo 33295 tailf 33836 tailfb 33838 ismgmOLD 35288 dfcnvrefrels2 35926 dfcnvrefrels3 35927 rclexi 40315 rtrclexlem 40316 cnvrcl0 40325 dfrtrcl5 40329 relexpmulg 40411 relexp01min 40414 relexpxpmin 40418 unidmex 41684 caragenval 43132 caragenunidm 43147 itcoval0 45076 itcoval1 45077 |
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