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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 7055, dff3 7056, and dff4 7057. (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 6498 | . 2 wff 𝐹:𝐴⟶𝐵 |
| 5 | 3, 1 | wfn 6497 | . . 3 wff 𝐹 Fn 𝐴 |
| 6 | 3 | crn 5635 | . . . 4 class ran 𝐹 |
| 7 | 6, 2 | wss 3903 | . . 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 6650 feq2 6651 feq3 6652 nff 6668 sbcfg 6670 ffn 6672 dffn2 6674 frn 6679 dffn3 6684 ffrnb 6686 fss 6688 fcof 6695 funssxp 6700 fdmrn 6703 fun 6706 fnfco 6709 fssres 6710 fcoi2 6719 fint 6723 fin 6724 f0 6725 fconst 6730 f1ssr 6746 fof 6756 dff1o2 6789 dff2 7055 dff3 7056 fmpt 7066 ffnfv 7075 ffvresb 7082 idref 7103 fpr 7111 dff1o6 7233 fliftf 7273 fiun 7899 f1iun 7900 ffoss 7902 1stcof 7975 2ndcof 7976 smores 8296 smores2 8298 iordsmo 8301 sbthlem9 9037 inf3lem6 9556 alephsmo 10026 alephsing 10200 axdc3lem2 10375 smobeth 10511 fpwwe2lem10 10565 gruiun 10724 gruima 10727 nqerf 10855 om2uzf1oi 13890 fclim 15490 invf 17706 funcres2b 17835 funcres2c 17841 hofcllem 18195 hofcl 18196 nfchnd 18548 gsumval2 18625 resmgmhm2b 18652 resmhm2b 18761 frmdss2 18802 gsumval3a 19849 subgdmdprd 19982 srgfcl 20148 lsslindf 21802 indlcim 21812 cnrest2 23247 lmss 23259 conncn 23387 txflf 23967 cnextf 24027 clsnsg 24071 tgpconncomp 24074 psmetxrge0 24274 causs 25271 ellimc2 25851 perfdvf 25877 c1lip2 25976 dvne0 25989 plyeq0 26189 plyreres 26263 aannenlem1 26309 taylf 26341 ulmss 26379 elno2 27639 elno3 27640 cutsf 27805 madef 27849 oniso 28284 mpteleeOLD 28986 ausgrusgrb 29256 ausgrumgri 29258 usgrexmplef 29350 subuhgr 29377 subupgr 29378 subumgr 29379 subusgr 29380 upgrres 29397 umgrres 29398 hhssnv 31358 pjfi 31798 maprnin 32827 cycpmconjslem1 33254 esplyfv1 33752 measdivcstALTV 34409 sitgf 34531 eulerpartlemn 34565 reprinrn 34802 cvmlift2lem9a 35525 satff 35632 icoreresf 37634 poimirlem30 37930 poimirlem31 37931 isbnd3 38064 dihf11lem 41671 ofoafg 43740 ofoaid1 43744 ofoaid2 43745 naddcnff 43748 ntrf 44508 clsf2 44511 gneispace3 44518 gneispacef2 44521 k0004lem1 44532 dvsid 44716 stoweidlem27 46414 stoweidlem29 46416 stoweidlem31 46418 fourierdlem15 46509 mbfresmf 47126 sinnpoly 47280 ffnafv 47560 fcdmvafv2v 47625 iccpartf 47820 slotresfo 49287 |
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