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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 6705 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → 𝐹 Fn 𝐴) | |
| 2 | fnex 7215 | . 2 ⊢ ((𝐹 Fn 𝐴 ∧ 𝐴 ∈ 𝐶) → 𝐹 ∈ V) | |
| 3 | 1, 2 | sylan 591 | 1 ⊢ ((𝐹:𝐴⟶𝐵 ∧ 𝐴 ∈ 𝐶) → 𝐹 ∈ V) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 400 ∈ wcel 2143 Vcvv 3455 Fn wfn 6531 ⟶wf 6532 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-rep 5238 ax-sep 5257 ax-nul 5269 ax-pr 5404 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-ral 3080 df-rex 3090 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4488 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-iun 4958 df-br 5110 df-opab 5174 df-mpt 5193 df-id 5556 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 |
| This theorem is referenced by: fexd 7225 f1oexrnex 7920 fsuppeq 8167 suppsnop 8170 f1domg 8964 ffsuppbi 9354 mapfienlem2 9362 oiexg 9493 infxpenc2lem2 10000 isf32lem10 10341 hasheqf1oi 14383 hashf1rn 14384 hashimarn 14473 iswrd 14548 climsup 15717 fsum 15767 supcvg 15906 fprod 15991 vdwmc 17033 vdwpc 17035 elsymgbas 19439 gsumval3a 19968 gsumval3lem1 19970 gsumval3lem2 19971 dmdprd 20065 cnfldfun 21536 cnfldfunALT 21537 tngngp3 24813 climcncf 25059 ulmval 26543 pserulm 26585 isismt 28803 isgrpoi 30850 isvcOLD 30931 isnv 30964 cnnvg 31030 cnnvs 31032 cnnvnm 31033 cncph 31171 ajval 31213 hvmulex 31363 hhph 31530 hlimi 31540 chlimi 31586 hhssva 31609 hhsssm 31610 hhssnm 31611 hhshsslem1 31619 elunop 32224 adjeq 32287 leoprf2 32479 fpwrelmapffslem 33077 ccatws1f1o 33271 lmdvg 34343 esumpfinvallem 34464 omsf 34686 eulerpartgbij 34762 eulerpartlemmf 34765 subfacp1lem5 35676 sinccvglem 36164 poimirlem24 38295 mbfresfi 38317 elghomlem2OLD 38537 islaut 40857 ispautN 40873 istendo 41534 binomcxplemnotnn0 45066 climexp 46321 climinf 46322 stirlinglem8 46795 fourierdlem70 46890 ismea 47165 meadjiunlem 47179 grtriclwlk3 48710 isassintop 48975 fdivmpt 49320 elbigolo1 49337 fucofvalne 50103 |
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