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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 7087, dff3 7088, and dff4 7089. (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 6523 | . 2 wff 𝐹:𝐴⟶𝐵 |
| 5 | 3, 1 | wfn 6522 | . . 3 wff 𝐹 Fn 𝐴 |
| 6 | 3 | crn 5648 | . . . 4 class ran 𝐹 |
| 7 | 6, 2 | wss 3898 | . . 3 wff ran 𝐹 ⊆ 𝐵 |
| 8 | 5, 7 | wa 401 | . 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 used by: feq1 6675 feq2 6676 feq3 6677 nff 6693 sbcfg 6695 ffn 6697 dffn2 6699 frn 6705 dffn3 6710 ffrnb 6712 fss 6714 fcof 6721 funssxp 6726 fdmrn 6729 fun 6732 fnfco 6735 fssres 6736 fcoi2 6745 fint 6749 fin 6750 f0 6751 fconst 6756 f1ssr 6774 fof 6784 dff1o2 6818 dff2 7087 dff3 7088 fmpt 7098 ffnfv 7107 ffvresb 7114 idref 7137 fpr 7146 dff1o6 7271 fliftf 7311 fiun 7938 f1iun 7939 ffoss 7941 1stcof 8014 2ndcof 8015 smores 8338 smores2 8340 iordsmo 8343 sbthlem9 9092 inf3lem6 9612 alephsmo 10152 alephsing 10325 axdc3lem2 10500 smobeth 10642 fpwwe2lem10 10696 gruiun 10855 gruima 10858 nqerf 10986 om2uzf1oi 14064 fclim 15687 invf 17904 funcres2b 18033 funcres2c 18039 hofcllem 18393 hofcl 18394 nfchnd 18746 mgmn0plusgf 18788 gsumval2 18836 resmgmhm2b 18863 resmhm2b 18979 frmdss2 19020 gsumval3a 20078 subgdmdprd 20211 srgfcl 20383 lsslindf 22097 indlcim 22107 cnrest2 23565 lmss 23577 conncn 23705 txflf 24286 cnextf 24346 clsnsg 24390 tgpconncomp 24393 psmetxrge0 24593 causs 25580 ellimc2 26158 perfdvf 26184 c1lip2 26279 dvne0 26292 plyeq0 26491 plyreres 26567 aannenlem1 26618 taylf 26651 ulmss 26687 elno2 27944 elno3 27945 cutsf 28111 madef 28155 oniso 28590 mpteleeOLD 29406 ausgrusgrb 29679 ausgrumgri 29681 usgrexmplef 29773 subuhgr 29800 subupgr 29801 subumgr 29802 subusgr 29803 upgrres 29820 umgrres 29821 hhssnv 31799 pjfi 32239 maprnin 33256 cycpmconjslem1 33648 esplyfv1 34134 measdivcstALTV 34791 sitgf 34913 eulerpartlemn 34947 reprinrn 35181 cvmlift2lem9a 35989 satff 36096 icoreresf 38195 poimirlem30 38488 poimirlem31 38489 isbnd3 38638 dihf11lem 42243 ofoafg 44299 ofoaid1 44303 ofoaid2 44304 naddcnff 44307 ntrf 45067 clsf2 45070 gneispace3 45077 gneispacef2 45080 k0004lem1 45091 dvsid 45259 stoweidlem27 46959 stoweidlem29 46961 stoweidlem31 46963 fourierdlem15 47054 mbfresmf 47671 ffnafv 48163 fcdmvafv2v 48228 iccpartf 48435 slotresfo 49929 |
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