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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 7049, dff3 7050, and dff4 7051. (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 6492 | . 2 wff 𝐹:𝐴⟶𝐵 |
| 5 | 3, 1 | wfn 6491 | . . 3 wff 𝐹 Fn 𝐴 |
| 6 | 3 | crn 5629 | . . . 4 class ran 𝐹 |
| 7 | 6, 2 | wss 3890 | . . 3 wff ran 𝐹 ⊆ 𝐵 |
| 8 | 5, 7 | wa 395 | . 2 wff (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵) |
| 9 | 4, 8 | wb 206 | 1 wff (𝐹:𝐴⟶𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵)) |
| Colors of variables: wff setvar class |
| This definition is referenced by: feq1 6644 feq2 6645 feq3 6646 nff 6662 sbcfg 6664 ffn 6666 dffn2 6668 frn 6673 dffn3 6678 ffrnb 6680 fss 6682 fcof 6689 funssxp 6694 fdmrn 6697 fun 6700 fnfco 6703 fssres 6704 fcoi2 6713 fint 6717 fin 6718 f0 6719 fconst 6724 f1ssr 6740 fof 6750 dff1o2 6783 dff2 7049 dff3 7050 fmpt 7060 ffnfv 7069 ffvresb 7076 idref 7097 fpr 7105 dff1o6 7227 fliftf 7267 fiun 7893 f1iun 7894 ffoss 7896 1stcof 7969 2ndcof 7970 smores 8289 smores2 8291 iordsmo 8294 sbthlem9 9030 inf3lem6 9551 alephsmo 10021 alephsing 10195 axdc3lem2 10370 smobeth 10506 fpwwe2lem10 10560 gruiun 10719 gruima 10722 nqerf 10850 om2uzf1oi 13912 fclim 15512 invf 17732 funcres2b 17861 funcres2c 17867 hofcllem 18221 hofcl 18222 nfchnd 18574 gsumval2 18651 resmgmhm2b 18678 resmhm2b 18787 frmdss2 18828 gsumval3a 19875 subgdmdprd 20008 srgfcl 20174 lsslindf 21807 indlcim 21817 cnrest2 23248 lmss 23260 conncn 23388 txflf 23968 cnextf 24028 clsnsg 24072 tgpconncomp 24075 psmetxrge0 24275 causs 25262 ellimc2 25841 perfdvf 25867 c1lip2 25962 dvne0 25975 plyeq0 26173 plyreres 26246 aannenlem1 26291 taylf 26323 ulmss 26359 elno2 27615 elno3 27616 cutsf 27781 madef 27825 oniso 28260 mpteleeOLD 28961 ausgrusgrb 29231 ausgrumgri 29233 usgrexmplef 29325 subuhgr 29352 subupgr 29353 subumgr 29354 subusgr 29355 upgrres 29372 umgrres 29373 hhssnv 31332 pjfi 31772 maprnin 32801 cycpmconjslem1 33212 esplyfv1 33710 measdivcstALTV 34366 sitgf 34488 eulerpartlemn 34522 reprinrn 34759 cvmlift2lem9a 35482 satff 35589 icoreresf 37665 poimirlem30 37968 poimirlem31 37969 isbnd3 38102 dihf11lem 41709 ofoafg 43779 ofoaid1 43783 ofoaid2 43784 naddcnff 43787 ntrf 44547 clsf2 44550 gneispace3 44557 gneispacef2 44560 k0004lem1 44571 dvsid 44755 stoweidlem27 46452 stoweidlem29 46454 stoweidlem31 46456 fourierdlem15 46547 mbfresmf 47164 sinnpoly 47330 ffnafv 47610 fcdmvafv2v 47675 iccpartf 47882 slotresfo 49365 |
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