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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 6655 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → 𝐹 Fn 𝐴) | |
| 2 | fnex 7161 | . 2 ⊢ ((𝐹 Fn 𝐴 ∧ 𝐴 ∈ 𝐶) → 𝐹 ∈ V) | |
| 3 | 1, 2 | sylan 586 | 1 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝐶) → 𝐹 ∈ V) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 396 ∈ wcel 2119 Vcvv 3431 Fn wfn 6480 ⟶wf 6481 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-rep 5199 ax-sep 5218 ax-nul 5228 ax-pr 5362 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-ral 3054 df-rex 3064 df-reu 3345 df-rab 3392 df-v 3433 df-sbc 3724 df-csb 3832 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4262 df-if 4455 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4839 df-iun 4923 df-br 5073 df-opab 5135 df-mpt 5154 df-id 5513 df-xp 5624 df-rel 5625 df-cnv 5626 df-co 5627 df-dm 5628 df-rn 5629 df-res 5630 df-ima 5631 df-iota 6441 df-fun 6487 df-fn 6488 df-f 6489 df-f1 6490 df-fo 6491 df-f1o 6492 df-fv 6493 |
| This theorem is referenced by: fexd 7171 f1oexrnex 7867 fsuppeq 8115 suppsnop 8118 f1domg 8908 ffsuppbi 9301 mapfienlem2 9309 oiexg 9440 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 21361 cnfldfunALT 21362 tngngp3 24639 climcncf 24885 ulmval 26363 pserulm 26405 elnoOLD 27628 isismt 28620 isgrpoi 30587 isvcOLD 30668 isnv 30701 cnnvg 30767 cnnvs 30769 cnnvnm 30770 cncph 30908 ajval 30950 hvmulex 31100 hhph 31267 hlimi 31277 chlimi 31323 hhssva 31346 hhsssm 31347 hhssnm 31348 hhshsslem1 31356 elunop 31961 adjeq 32024 leoprf2 32216 fpwrelmapffslem 32824 ccatws1f1o 33030 lmdvg 34137 esumpfinvallem 34258 omsf 34480 eulerpartgbij 34556 eulerpartlemmf 34559 subfacp1lem5 35412 sinccvglem 35900 poimirlem24 38011 mbfresfi 38033 elghomlem2OLD 38253 islaut 40575 ispautN 40591 istendo 41252 binomcxplemnotnn0 44800 climexp 46050 climinf 46051 stirlinglem8 46524 fourierdlem70 46619 ismea 46894 meadjiunlem 46908 grtriclwlk3 48436 isassintop 48701 fdivmpt 49031 elbigolo1 49048 fucofvalne 49815 |
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