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Mirrors > Home > MPE Home > Th. List > fex | Structured version Visualization version GIF version |
Description: If the domain of a mapping is a set, the function is a set. (Contributed by NM, 3-Oct-1999.) |
Ref | Expression |
---|---|
fex | ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝐶) → 𝐹 ∈ V) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ffn 6487 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → 𝐹 Fn 𝐴) | |
2 | fnex 6957 | . 2 ⊢ ((𝐹 Fn 𝐴 ∧ 𝐴 ∈ 𝐶) → 𝐹 ∈ V) | |
3 | 1, 2 | sylan 583 | 1 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝐶) → 𝐹 ∈ V) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 399 ∈ wcel 2111 Vcvv 3441 Fn wfn 6319 ⟶wf 6320 |
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-rep 5154 ax-sep 5167 ax-nul 5174 ax-pr 5295 |
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-ne 2988 df-ral 3111 df-rex 3112 df-reu 3113 df-rab 3115 df-v 3443 df-sbc 3721 df-csb 3829 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-iun 4883 df-br 5031 df-opab 5093 df-mpt 5111 df-id 5425 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-res 5531 df-ima 5532 df-iota 6283 df-fun 6326 df-fn 6327 df-f 6328 df-f1 6329 df-fo 6330 df-f1o 6331 df-fv 6332 |
This theorem is referenced by: fexd 6967 f1oexrnex 7614 frnsuppeq 7825 suppsnop 7827 f1domg 8512 fdmfisuppfi 8826 frnfsuppbi 8846 fsuppco2 8850 fsuppcor 8851 mapfienlem2 8853 ordtypelem10 8975 oiexg 8983 cnfcom3clem 9152 infxpenc2lem2 9431 fin23lem32 9755 isf32lem10 9773 focdmex 13707 hasheqf1oi 13708 hashf1rn 13709 hasheqf1od 13710 hashimarn 13797 hashf1lem1 13809 fz1isolem 13815 iswrd 13859 climsup 15018 fsum 15069 supcvg 15203 fprod 15287 vdwmc 16304 vdwpc 16306 ramval 16334 imasval 16776 imasle 16788 pwsco1mhm 17988 isghm 18350 elsymgbas 18494 gsumval3a 19016 gsumval3lem1 19018 gsumval3lem2 19019 gsumzres 19022 gsumzf1o 19025 gsumzaddlem 19034 gsumzadd 19035 gsumzmhm 19050 gsumzoppg 19057 gsumpt 19075 gsum2dlem2 19084 dmdprd 19113 prdslmodd 19734 cnfldfun 20103 cnfldfunALT 20104 dsmmsubg 20432 dsmmlss 20433 islindf2 20503 f1lindf 20511 islindf4 20527 gsumply1subr 20863 prdstps 22234 qtopval2 22301 tsmsres 22749 tngngp3 23262 climcncf 23505 ulmval 24975 pserulm 25017 jensen 25574 isismt 26328 isgrpoi 28281 isvcOLD 28362 isnv 28395 cnnvg 28461 cnnvs 28463 cnnvnm 28464 cncph 28602 ajval 28644 hvmulex 28794 hhph 28961 hlimi 28971 chlimi 29017 hhssva 29040 hhsssm 29041 hhssnm 29042 hhshsslem1 29050 elunop 29655 adjeq 29718 leoprf2 29910 fpwrelmapffslem 30494 pwrssmgc 30706 lmdvg 31306 esumpfinvallem 31443 ofcfval4 31474 omsfval 31662 omsf 31664 omssubadd 31668 carsgval 31671 eulerpartgbij 31740 eulerpartlemmf 31743 sseqval 31756 subfacp1lem5 32544 sinccvglem 33028 elno 33266 filnetlem4 33842 bj-finsumval0 34700 poimirlem24 35081 mbfresfi 35103 elghomlem2OLD 35324 isrngod 35336 isgrpda 35393 iscringd 35436 islaut 37379 ispautN 37395 istendo 38056 binomcxplemnotnn0 41060 fidmfisupp 41828 climexp 42247 climinf 42248 limsupre 42283 stirlinglem8 42723 fourierdlem70 42818 fourierdlem71 42819 fourierdlem80 42828 sge0val 43005 sge0f1o 43021 ismea 43090 meadjiunlem 43104 isomennd 43170 isassintop 44470 fdivmpt 44954 elbigolo1 44971 |
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