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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 6517 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → 𝐹 Fn 𝐴) | |
2 | fnex 6983 | . 2 ⊢ ((𝐹 Fn 𝐴 ∧ 𝐴 ∈ 𝐶) → 𝐹 ∈ V) | |
3 | 1, 2 | sylan 582 | 1 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝐶) → 𝐹 ∈ V) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 ∈ wcel 2113 Vcvv 3497 Fn wfn 6353 ⟶wf 6354 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1969 ax-7 2014 ax-8 2115 ax-9 2123 ax-10 2144 ax-11 2160 ax-12 2176 ax-ext 2796 ax-rep 5193 ax-sep 5206 ax-nul 5213 ax-pr 5333 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1539 df-ex 1780 df-nf 1784 df-sb 2069 df-mo 2621 df-eu 2653 df-clab 2803 df-cleq 2817 df-clel 2896 df-nfc 2966 df-ne 3020 df-ral 3146 df-rex 3147 df-reu 3148 df-rab 3150 df-v 3499 df-sbc 3776 df-csb 3887 df-dif 3942 df-un 3944 df-in 3946 df-ss 3955 df-nul 4295 df-if 4471 df-sn 4571 df-pr 4573 df-op 4577 df-uni 4842 df-iun 4924 df-br 5070 df-opab 5132 df-mpt 5150 df-id 5463 df-xp 5564 df-rel 5565 df-cnv 5566 df-co 5567 df-dm 5568 df-rn 5569 df-res 5570 df-ima 5571 df-iota 6317 df-fun 6360 df-fn 6361 df-f 6362 df-f1 6363 df-fo 6364 df-f1o 6365 df-fv 6366 |
This theorem is referenced by: f1oexrnex 7635 frnsuppeq 7845 suppsnop 7847 f1domg 8532 fdmfisuppfi 8845 frnfsuppbi 8865 fsuppco2 8869 fsuppcor 8870 mapfienlem2 8872 ordtypelem10 8994 oiexg 9002 cnfcom3clem 9171 infxpenc2lem2 9449 fin23lem32 9769 isf32lem10 9787 focdmex 13714 hasheqf1oi 13715 hashf1rn 13716 hasheqf1od 13717 hashimarn 13804 hashf1lem1 13816 fz1isolem 13822 iswrd 13866 climsup 15029 fsum 15080 supcvg 15214 fprod 15298 vdwmc 16317 vdwpc 16319 ramval 16347 imasval 16787 imasle 16799 pwsco1mhm 17999 isghm 18361 elsymgbas 18505 gsumval3a 19026 gsumval3lem1 19028 gsumval3lem2 19029 gsumzres 19032 gsumzf1o 19035 gsumzaddlem 19044 gsumzadd 19045 gsumzmhm 19060 gsumzoppg 19067 gsumpt 19085 gsum2dlem2 19094 dmdprd 19123 prdslmodd 19744 gsumply1subr 20405 cnfldfun 20560 cnfldfunALT 20561 dsmmsubg 20890 dsmmlss 20891 islindf2 20961 f1lindf 20969 islindf4 20985 prdstps 22240 qtopval2 22307 tsmsres 22755 tngngp3 23268 climcncf 23511 ulmval 24971 pserulm 25013 jensen 25569 isismt 26323 isgrpoi 28278 isvcOLD 28359 isnv 28392 cnnvg 28458 cnnvs 28460 cnnvnm 28461 cncph 28599 ajval 28641 hvmulex 28791 hhph 28958 hlimi 28968 chlimi 29014 hhssva 29037 hhsssm 29038 hhssnm 29039 hhshsslem1 29047 elunop 29652 adjeq 29715 leoprf2 29907 fpwrelmapffslem 30471 lmdvg 31200 esumpfinvallem 31337 ofcfval4 31368 omsfval 31556 omsf 31558 omssubadd 31562 carsgval 31565 eulerpartgbij 31634 eulerpartlemmf 31637 sseqval 31650 subfacp1lem5 32435 sinccvglem 32919 elno 33157 filnetlem4 33733 bj-finsumval0 34571 poimirlem24 34920 mbfresfi 34942 elghomlem2OLD 35168 isrngod 35180 isgrpda 35237 iscringd 35280 islaut 37223 ispautN 37239 istendo 37900 binomcxplemnotnn0 40694 fexd 41385 fidmfisupp 41468 climexp 41892 climinf 41893 limsupre 41928 stirlinglem8 42373 fourierdlem70 42468 fourierdlem71 42469 fourierdlem80 42478 sge0val 42655 sge0f1o 42671 ismea 42740 meadjiunlem 42754 isomennd 42820 isassintop 44124 fdivmpt 44607 elbigolo1 44624 |
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