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| Mirrors > Home > MPE Home > Th. List > df-f | Structured version Visualization version GIF version | ||
| Description: Define a function (mapping) with domain and codomain. Definition 6.15(3) of [TakeutiZaring] p. 27. 𝐹:𝐴⟶𝐵 can be read as "𝐹 is a function from 𝐴 to 𝐵". For alternate definitions, see dff2 7094, dff3 7095, and dff4 7096. (Contributed by NM, 1-Aug-1994.) |
| Ref | Expression |
|---|---|
| df-f | ⊢ (𝐹:𝐴⟶𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cA | . . 3 class 𝐴 | |
| 2 | cB | . . 3 class 𝐵 | |
| 3 | cF | . . 3 class 𝐹 | |
| 4 | 1, 2, 3 | wf 6532 | . 2 wff 𝐹:𝐴⟶𝐵 |
| 5 | 3, 1 | wfn 6531 | . . 3 wff 𝐹 Fn 𝐴 |
| 6 | 3 | crn 5662 | . . . 4 class ran 𝐹 |
| 7 | 6, 2 | wss 3904 | . . 3 wff ran 𝐹 ⊆ 𝐵 |
| 8 | 5, 7 | wa 400 | . 2 wff (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵) |
| 9 | 4, 8 | wb 209 | 1 wff (𝐹:𝐴⟶𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵)) |
| Colors of variables: wff setvar class |
| This definition is referenced by: feq1 6683 feq2 6684 feq3 6685 nff 6701 sbcfg 6703 ffn 6705 dffn2 6707 frn 6713 dffn3 6718 ffrnb 6720 fss 6722 fcof 6729 funssxp 6734 fdmrn 6737 fun 6740 fnfco 6743 fssres 6744 fcoi2 6753 fint 6757 fin 6758 f0 6759 fconst 6764 f1ssr 6782 fof 6792 dff1o2 6826 dff2 7094 dff3 7095 fmpt 7105 ffnfv 7114 ffvresb 7121 idref 7142 fpr 7151 dff1o6 7273 fliftf 7313 fiun 7939 f1iun 7940 ffoss 7942 1stcof 8015 2ndcof 8016 smores 8338 smores2 8340 iordsmo 8343 sbthlem9 9082 inf3lem6 9601 alephsmo 10085 alephsing 10259 axdc3lem2 10434 smobeth 10570 fpwwe2lem10 10624 gruiun 10783 gruima 10786 nqerf 10914 om2uzf1oi 13988 fclim 15603 invf 17824 funcres2b 17953 funcres2c 17959 hofcllem 18313 hofcl 18314 nfchnd 18666 gsumval2 18743 resmgmhm2b 18770 resmhm2b 18880 frmdss2 18921 gsumval3a 19972 subgdmdprd 20105 srgfcl 20277 lsslindf 21959 indlcim 21969 cnrest2 23422 lmss 23434 conncn 23562 txflf 24142 cnextf 24202 clsnsg 24246 tgpconncomp 24249 psmetxrge0 24449 causs 25436 ellimc2 26015 perfdvf 26041 c1lip2 26136 dvne0 26149 plyeq0 26347 plyreres 26423 aannenlem1 26468 taylf 26500 ulmss 26536 elno2 27794 elno3 27795 cutsf 27961 madef 28005 oniso 28440 mpteleeOLD 29211 ausgrusgrb 29481 ausgrumgri 29483 usgrexmplef 29575 subuhgr 29602 subupgr 29603 subumgr 29604 subusgr 29605 upgrres 29622 umgrres 29623 hhssnv 31582 pjfi 32022 maprnin 33042 cycpmconjslem1 33440 esplyfv1 33925 measdivcstALTV 34581 sitgf 34703 eulerpartlemn 34737 reprinrn 34971 cvmlift2lem9a 35749 satff 35856 icoreresf 37942 poimirlem30 38245 poimirlem31 38246 isbnd3 38379 dihf11lem 41986 ofoafg 44029 ofoaid1 44033 ofoaid2 44034 naddcnff 44037 ntrf 44797 clsf2 44800 gneispace3 44807 gneispacef2 44810 k0004lem1 44821 dvsid 44989 stoweidlem27 46689 stoweidlem29 46691 stoweidlem31 46693 fourierdlem15 46784 mbfresmf 47401 sinnpoly 47573 ffnafv 47853 fcdmvafv2v 47918 iccpartf 48125 slotresfo 49622 |
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