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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 6703 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → 𝐹 Fn 𝐴) | |
| 2 | fnex 7213 | . 2 ⊢ ((𝐹 Fn 𝐴 ∧ 𝐴 ∈ 𝐶) → 𝐹 ∈ V) | |
| 3 | 1, 2 | sylan 591 | 1 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝐶) → 𝐹 ∈ V) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 400 ∈ wcel 2149 Vcvv 3463 Fn wfn 6529 ⟶wf 6530 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-rep 5239 ax-sep 5258 ax-nul 5268 ax-pr 5402 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-ral 3086 df-rex 3096 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4490 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4874 df-iun 4959 df-br 5111 df-opab 5175 df-mpt 5194 df-id 5554 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-iota 6490 df-fun 6536 df-fn 6537 df-f 6538 df-f1 6539 df-fo 6540 df-f1o 6541 df-fv 6542 |
| This theorem is referenced by: fexd 7223 f1oexrnex 7920 fsuppeq 8167 suppsnop 8170 f1domg 8964 ffsuppbi 9354 mapfienlem2 9362 oiexg 9493 infxpenc2lem2 10000 isf32lem10 10342 hasheqf1oi 14383 hashf1rn 14384 hashimarn 14473 iswrd 14548 climsup 15717 fsum 15767 supcvg 15906 fprod 15991 vdwmc 17034 vdwpc 17036 elsymgbas 19440 gsumval3a 19969 gsumval3lem1 19971 gsumval3lem2 19972 dmdprd 20066 cnfldfun 21501 cnfldfunALT 21502 tngngp3 24778 climcncf 25024 ulmval 26505 pserulm 26547 isismt 28765 isgrpoi 30787 isvcOLD 30868 isnv 30901 cnnvg 30967 cnnvs 30969 cnnvnm 30970 cncph 31108 ajval 31150 hvmulex 31300 hhph 31467 hlimi 31477 chlimi 31523 hhssva 31546 hhsssm 31547 hhssnm 31548 hhshsslem1 31556 elunop 32161 adjeq 32224 leoprf2 32416 fpwrelmapffslem 33014 ccatws1f1o 33208 lmdvg 34284 esumpfinvallem 34405 omsf 34627 eulerpartgbij 34703 eulerpartlemmf 34706 subfacp1lem5 35571 sinccvglem 36059 poimirlem24 38178 mbfresfi 38200 elghomlem2OLD 38420 islaut 40742 ispautN 40758 istendo 41419 binomcxplemnotnn0 44953 climexp 46208 climinf 46209 stirlinglem8 46682 fourierdlem70 46777 ismea 47052 meadjiunlem 47066 grtriclwlk3 48594 isassintop 48859 fdivmpt 49200 elbigolo1 49217 fucofvalne 49983 |
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