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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 7163 | . 2 ⊢ ((𝐹 Fn 𝐴 ∧ 𝐴 ∈ 𝐶) → 𝐹 ∈ V) | |
| 3 | 1, 2 | sylan 580 | 1 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝐶) → 𝐹 ∈ V) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∈ wcel 2113 Vcvv 3440 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 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2184 ax-ext 2708 ax-rep 5224 ax-sep 5241 ax-nul 5251 ax-pr 5377 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3061 df-reu 3351 df-rab 3400 df-v 3442 df-sbc 3741 df-csb 3850 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-nul 4286 df-if 4480 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-iun 4948 df-br 5099 df-opab 5161 df-mpt 5180 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 7173 f1oexrnex 7869 fsuppeq 8117 suppsnop 8120 f1domg 8908 ffsuppbi 9301 mapfienlem2 9309 oiexg 9440 infxpenc2lem2 9930 isf32lem10 10272 hasheqf1oi 14274 hashf1rn 14275 hashimarn 14363 iswrd 14438 climsup 15593 fsum 15643 supcvg 15779 fprod 15864 vdwmc 16906 vdwpc 16908 isghmOLD 19145 elsymgbas 19303 gsumval3a 19832 gsumval3lem1 19834 gsumval3lem2 19835 dmdprd 19929 cnfldfun 21323 cnfldfunALT 21324 cnfldfunOLD 21336 cnfldfunALTOLD 21337 tngngp3 24600 climcncf 24849 ulmval 26345 pserulm 26387 elnoOLD 27614 isismt 28606 isgrpoi 30573 isvcOLD 30654 isnv 30687 cnnvg 30753 cnnvs 30755 cnnvnm 30756 cncph 30894 ajval 30936 hvmulex 31086 hhph 31253 hlimi 31263 chlimi 31309 hhssva 31332 hhsssm 31333 hhssnm 31334 hhshsslem1 31342 elunop 31947 adjeq 32010 leoprf2 32202 fpwrelmapffslem 32811 ccatws1f1o 33033 lmdvg 34110 esumpfinvallem 34231 omsf 34453 eulerpartgbij 34529 eulerpartlemmf 34532 subfacp1lem5 35378 sinccvglem 35866 poimirlem24 37845 mbfresfi 37867 elghomlem2OLD 38087 islaut 40343 ispautN 40359 istendo 41020 binomcxplemnotnn0 44597 climexp 45851 climinf 45852 stirlinglem8 46325 fourierdlem70 46420 ismea 46695 meadjiunlem 46709 grtriclwlk3 48191 isassintop 48456 fdivmpt 48786 elbigolo1 48803 fucofvalne 49570 |
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