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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 6664 | . 2 ⊢ (𝐹:𝐴⟶𝐵 → 𝐹 Fn 𝐴) | |
2 | fnex 7162 | . 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 397 ∈ wcel 2107 Vcvv 3444 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 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2709 ax-rep 5241 ax-sep 5255 ax-nul 5262 ax-pr 5383 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2888 df-ne 2943 df-ral 3064 df-rex 3073 df-reu 3353 df-rab 3407 df-v 3446 df-sbc 3739 df-csb 3855 df-dif 3912 df-un 3914 df-in 3916 df-ss 3926 df-nul 4282 df-if 4486 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4865 df-iun 4955 df-br 5105 df-opab 5167 df-mpt 5188 df-id 5529 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-iota 6444 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 7172 f1oexrnex 7855 fsuppeq 8074 suppsnop 8077 f1domg 8846 ffsuppbi 9268 mapfienlem2 9276 oiexg 9405 infxpenc2lem2 9890 isf32lem10 10232 hasheqf1oi 14180 hashf1rn 14181 hashimarn 14269 iswrd 14333 climsup 15490 fsum 15541 supcvg 15677 fprod 15760 vdwmc 16786 vdwpc 16788 isghm 18943 elsymgbas 19090 gsumval3a 19615 gsumval3lem1 19617 gsumval3lem2 19618 dmdprd 19712 cnfldfun 20737 cnfldfunALT 20738 cnfldfunALTOLD 20739 tngngp3 23948 climcncf 24191 ulmval 25667 pserulm 25709 elno 26922 isismt 27281 isgrpoi 29245 isvcOLD 29326 isnv 29359 cnnvg 29425 cnnvs 29427 cnnvnm 29428 cncph 29566 ajval 29608 hvmulex 29758 hhph 29925 hlimi 29935 chlimi 29981 hhssva 30004 hhsssm 30005 hhssnm 30006 hhshsslem1 30014 elunop 30619 adjeq 30682 leoprf2 30874 fpwrelmapffslem 31450 lmdvg 32314 esumpfinvallem 32453 omsf 32676 eulerpartgbij 32752 eulerpartlemmf 32755 subfacp1lem5 33558 sinccvglem 34042 poimirlem24 36033 mbfresfi 36055 elghomlem2OLD 36276 islaut 38477 ispautN 38493 istendo 39154 binomcxplemnotnn0 42437 climexp 43637 climinf 43638 stirlinglem8 44113 fourierdlem70 44208 ismea 44483 meadjiunlem 44497 isassintop 45935 fdivmpt 46417 elbigolo1 46434 |
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