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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 6707 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → 𝐹 Fn 𝐴) | |
| 2 | fnex 7221 | . 2 ⊢ ((𝐹 Fn 𝐴 ∧ 𝐴 ∈ 𝐶) → 𝐹 ∈ V) | |
| 3 | 1, 2 | sylan 592 | 1 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝐶) → 𝐹 ∈ V) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 ∈ wcel 2145 Vcvv 3451 Fn wfn 6532 ⟶wf 6533 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-rep 5232 ax-sep 5249 ax-nul 5260 ax-pr 5391 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5546 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 |
| This theorem is used by: fexd 7231 f1oexrnex 7937 fsuppeq 8185 suppsnop 8188 f1domg 8991 ffsuppbi 9383 mapfienlem2 9391 oiexg 9522 infxpenc2lem2 10092 isf32lem10 10433 hasheqf1oi 14488 hashf1rn 14489 hashimarn 14578 iswrd 14653 climsup 15830 fsum 15879 supcvg 16018 fprod 16101 vdwmc 17149 vdwpc 17151 elsymgbas 19581 gsumval3a 20110 gsumval3lem1 20112 gsumval3lem2 20113 dmdprd 20207 cnfldfun 21685 cnfldfunALT 21686 tngngp3 24968 climcncf 25214 ulmval 26700 pserulm 26742 isismt 28990 isgrpoi 31093 isvcOLD 31174 isnv 31207 cnnvg 31273 cnnvs 31275 cnnvnm 31276 cncph 31414 ajval 31456 hvmulex 31606 hhph 31773 hlimi 31783 chlimi 31829 hhssva 31852 hhsssm 31853 hhssnm 31854 hhshsslem1 31862 elunop 32467 adjeq 32530 leoprf2 32722 fpwrelmapffslem 33317 ccatws1f1o 33507 lmdvg 34578 esumpfinvallem 34699 omsf 34921 eulerpartgbij 34997 eulerpartlemmf 35000 subfacp1lem5 35928 sinccvglem 36416 poimirlem24 38542 mbfresfi 38564 elghomlem2OLD 38800 islaut 41120 ispautN 41136 istendo 41797 binomcxplemnotnn0 45325 climexp 46586 climinf 46587 stirlinglem8 47060 fourierdlem70 47155 ismea 47430 meadjiunlem 47444 grtriclwlk3 49012 isassintop 49276 fdivmpt 49621 elbigolo1 49638 fucofvalne 50402 |
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