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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 6670 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → 𝐹 Fn 𝐴) | |
| 2 | fnex 7174 | . 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 6495 ⟶wf 6496 |
| 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 5213 ax-sep 5232 ax-nul 5242 ax-pr 5376 |
| 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 5527 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 |
| This theorem is referenced by: fexd 7184 f1oexrnex 7880 fsuppeq 8127 suppsnop 8130 f1domg 8920 ffsuppbi 9313 mapfienlem2 9321 oiexg 9452 infxpenc2lem2 9944 isf32lem10 10286 hasheqf1oi 14315 hashf1rn 14316 hashimarn 14404 iswrd 14479 climsup 15634 fsum 15684 supcvg 15823 fprod 15908 vdwmc 16951 vdwpc 16953 isghmOLD 19193 elsymgbas 19351 gsumval3a 19880 gsumval3lem1 19882 gsumval3lem2 19883 dmdprd 19977 cnfldfun 21368 cnfldfunALT 21369 tngngp3 24623 climcncf 24869 ulmval 26347 pserulm 26389 elnoOLD 27612 isismt 28604 isgrpoi 30571 isvcOLD 30652 isnv 30685 cnnvg 30751 cnnvs 30753 cnnvnm 30754 cncph 30892 ajval 30934 hvmulex 31084 hhph 31251 hlimi 31261 chlimi 31307 hhssva 31330 hhsssm 31331 hhssnm 31332 hhshsslem1 31340 elunop 31945 adjeq 32008 leoprf2 32200 fpwrelmapffslem 32807 ccatws1f1o 33013 lmdvg 34099 esumpfinvallem 34220 omsf 34442 eulerpartgbij 34518 eulerpartlemmf 34521 subfacp1lem5 35368 sinccvglem 35856 poimirlem24 37967 mbfresfi 37989 elghomlem2OLD 38209 islaut 40531 ispautN 40547 istendo 41208 binomcxplemnotnn0 44785 climexp 46037 climinf 46038 stirlinglem8 46511 fourierdlem70 46606 ismea 46881 meadjiunlem 46895 grtriclwlk3 48423 isassintop 48688 fdivmpt 49018 elbigolo1 49035 fucofvalne 49802 |
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