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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 6702 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → 𝐹 Fn 𝐴) | |
| 2 | fnex 7216 | . 2 ⊢ ((𝐹 Fn 𝐴 ∧ 𝐴 ∈ 𝐶) → 𝐹 ∈ V) | |
| 3 | 1, 2 | sylan 592 | 1 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝐶) → 𝐹 ∈ V) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 ∈ wcel 2145 Vcvv 3450 Fn wfn 6528 ⟶wf 6529 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-rep 5232 ax-sep 5251 ax-nul 5263 ax-pr 5398 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5550 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 |
| This theorem is used by: fexd 7226 f1oexrnex 7924 fsuppeq 8173 suppsnop 8176 f1domg 8977 ffsuppbi 9368 mapfienlem2 9376 oiexg 9507 infxpenc2lem2 10023 isf32lem10 10364 hasheqf1oi 14415 hashf1rn 14416 hashimarn 14505 iswrd 14580 climsup 15757 fsum 15806 supcvg 15945 fprod 16028 vdwmc 17070 vdwpc 17072 elsymgbas 19501 gsumval3a 20030 gsumval3lem1 20032 gsumval3lem2 20033 dmdprd 20127 cnfldfun 21599 cnfldfunALT 21600 tngngp3 24882 climcncf 25128 ulmval 26616 pserulm 26658 isismt 28876 isgrpoi 30979 isvcOLD 31060 isnv 31093 cnnvg 31159 cnnvs 31161 cnnvnm 31162 cncph 31300 ajval 31342 hvmulex 31492 hhph 31659 hlimi 31669 chlimi 31715 hhssva 31738 hhsssm 31739 hhssnm 31740 hhshsslem1 31748 elunop 32353 adjeq 32416 leoprf2 32608 fpwrelmapffslem 33203 ccatws1f1o 33393 lmdvg 34463 esumpfinvallem 34584 omsf 34807 eulerpartgbij 34883 eulerpartlemmf 34886 subfacp1lem5 35763 sinccvglem 36251 poimirlem24 38393 mbfresfi 38415 elghomlem2OLD 38636 islaut 40956 ispautN 40972 istendo 41633 binomcxplemnotnn0 45180 climexp 46435 climinf 46436 stirlinglem8 46909 fourierdlem70 47004 ismea 47279 meadjiunlem 47293 grtriclwlk3 48861 isassintop 49125 fdivmpt 49470 elbigolo1 49487 fucofvalne 50251 |
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