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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 6662 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → 𝐹 Fn 𝐴) | |
| 2 | fnex 7165 | . 2 ⊢ ((𝐹 Fn 𝐴 ∧ 𝐴 ∈ 𝐶) → 𝐹 ∈ V) | |
| 3 | 1, 2 | sylan 581 | 1 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝐶) → 𝐹 ∈ V) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∈ wcel 2114 Vcvv 3430 Fn wfn 6487 ⟶wf 6488 |
| 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 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5212 ax-sep 5231 ax-nul 5241 ax-pr 5370 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5519 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 |
| This theorem is referenced by: fexd 7175 f1oexrnex 7871 fsuppeq 8118 suppsnop 8121 f1domg 8911 ffsuppbi 9304 mapfienlem2 9312 oiexg 9443 infxpenc2lem2 9933 isf32lem10 10275 hasheqf1oi 14304 hashf1rn 14305 hashimarn 14393 iswrd 14468 climsup 15623 fsum 15673 supcvg 15812 fprod 15897 vdwmc 16940 vdwpc 16942 isghmOLD 19182 elsymgbas 19340 gsumval3a 19869 gsumval3lem1 19871 gsumval3lem2 19872 dmdprd 19966 cnfldfun 21358 cnfldfunALT 21359 cnfldfunOLD 21371 cnfldfunALTOLD 21372 tngngp3 24631 climcncf 24877 ulmval 26358 pserulm 26400 elnoOLD 27624 isismt 28616 isgrpoi 30584 isvcOLD 30665 isnv 30698 cnnvg 30764 cnnvs 30766 cnnvnm 30767 cncph 30905 ajval 30947 hvmulex 31097 hhph 31264 hlimi 31274 chlimi 31320 hhssva 31343 hhsssm 31344 hhssnm 31345 hhshsslem1 31353 elunop 31958 adjeq 32021 leoprf2 32213 fpwrelmapffslem 32820 ccatws1f1o 33026 lmdvg 34113 esumpfinvallem 34234 omsf 34456 eulerpartgbij 34532 eulerpartlemmf 34535 subfacp1lem5 35382 sinccvglem 35870 poimirlem24 37979 mbfresfi 38001 elghomlem2OLD 38221 islaut 40543 ispautN 40559 istendo 41220 binomcxplemnotnn0 44801 climexp 46053 climinf 46054 stirlinglem8 46527 fourierdlem70 46622 ismea 46897 meadjiunlem 46911 grtriclwlk3 48433 isassintop 48698 fdivmpt 49028 elbigolo1 49045 fucofvalne 49812 |
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