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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 6686 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → 𝐹 Fn 𝐴) | |
| 2 | fnex 7196 | . 2 ⊢ ((𝐹 Fn 𝐴 ∧ 𝐴 ∈ 𝐶) → 𝐹 ∈ V) | |
| 3 | 1, 2 | sylan 589 | 1 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝐶) → 𝐹 ∈ V) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 399 ∈ wcel 2141 Vcvv 3453 Fn wfn 6511 ⟶wf 6512 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-rep 5224 ax-sep 5243 ax-nul 5253 ax-pr 5387 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3076 df-rex 3086 df-reu 3367 df-rab 3414 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4284 df-if 4478 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4863 df-iun 4948 df-br 5098 df-opab 5160 df-mpt 5179 df-id 5538 df-xp 5649 df-rel 5650 df-cnv 5651 df-co 5652 df-dm 5653 df-rn 5654 df-res 5655 df-ima 5656 df-iota 6472 df-fun 6518 df-fn 6519 df-f 6520 df-f1 6521 df-fo 6522 df-f1o 6523 df-fv 6524 |
| This theorem is referenced by: fexd 7206 f1oexrnex 7903 fsuppeq 8149 suppsnop 8152 f1domg 8946 ffsuppbi 9338 mapfienlem2 9346 oiexg 9477 infxpenc2lem2 9970 isf32lem10 10313 hasheqf1oi 14358 hashf1rn 14359 hashimarn 14447 iswrd 14522 climsup 15688 fsum 15738 supcvg 15877 fprod 15962 vdwmc 17005 vdwpc 17007 elsymgbas 19405 gsumval3a 19934 gsumval3lem1 19936 gsumval3lem2 19937 dmdprd 20031 cnfldfun 21426 cnfldfunALT 21427 tngngp3 24704 climcncf 24950 ulmval 26431 pserulm 26473 isismt 28691 isgrpoi 30658 isvcOLD 30739 isnv 30772 cnnvg 30838 cnnvs 30840 cnnvnm 30841 cncph 30979 ajval 31021 hvmulex 31171 hhph 31338 hlimi 31348 chlimi 31394 hhssva 31417 hhsssm 31418 hhssnm 31419 hhshsslem1 31427 elunop 32032 adjeq 32095 leoprf2 32287 fpwrelmapffslem 32895 ccatws1f1o 33090 lmdvg 34211 esumpfinvallem 34332 omsf 34554 eulerpartgbij 34630 eulerpartlemmf 34633 subfacp1lem5 35495 sinccvglem 35983 poimirlem24 38104 mbfresfi 38126 elghomlem2OLD 38346 islaut 40668 ispautN 40684 istendo 41345 binomcxplemnotnn0 44893 climexp 46142 climinf 46143 stirlinglem8 46616 fourierdlem70 46711 ismea 46986 meadjiunlem 47000 grtriclwlk3 48528 isassintop 48793 fdivmpt 49123 elbigolo1 49140 fucofvalne 49907 |
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