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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 7043, dff3 7044, and dff4 7045. (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 6484 | . 2 wff 𝐹:𝐴⟶𝐵 |
| 5 | 3, 1 | wfn 6483 | . . 3 wff 𝐹 Fn 𝐴 |
| 6 | 3 | crn 5621 | . . . 4 class ran 𝐹 |
| 7 | 6, 2 | wss 3884 | . . 3 wff ran 𝐹 ⊆ 𝐵 |
| 8 | 5, 7 | wa 397 | . 2 wff (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵) |
| 9 | 4, 8 | wb 208 | 1 wff (𝐹:𝐴⟶𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵)) |
| Colors of variables: wff setvar class |
| This definition is referenced by: feq1 6636 feq2 6637 feq3 6638 nff 6654 sbcfg 6656 ffn 6658 dffn2 6660 frn 6665 dffn3 6670 ffrnb 6672 fss 6674 fcof 6681 funssxp 6686 fdmrn 6689 fun 6692 fnfco 6695 fssres 6696 fcoi2 6705 fint 6709 fin 6710 f0 6711 fconst 6716 f1ssr 6732 fof 6742 dff1o2 6775 dff2 7043 dff3 7044 fmpt 7054 ffnfv 7063 ffvresb 7070 idref 7091 fpr 7100 dff1o6 7222 fliftf 7262 fiun 7887 f1iun 7888 ffoss 7890 1stcof 7963 2ndcof 7964 smores 8285 smores2 8287 iordsmo 8290 sbthlem9 9027 inf3lem6 9549 alephsmo 10019 alephsing 10194 axdc3lem2 10369 smobeth 10505 fpwwe2lem10 10559 gruiun 10718 gruima 10721 nqerf 10849 om2uzf1oi 13910 fclim 15510 invf 17730 funcres2b 17859 funcres2c 17865 hofcllem 18219 hofcl 18220 nfchnd 18572 gsumval2 18649 resmgmhm2b 18676 resmhm2b 18785 frmdss2 18826 gsumval3a 19872 subgdmdprd 20005 srgfcl 20171 lsslindf 21808 indlcim 21818 cnrest2 23272 lmss 23284 conncn 23412 txflf 23992 cnextf 24052 clsnsg 24096 tgpconncomp 24099 psmetxrge0 24299 causs 25286 ellimc2 25865 perfdvf 25891 c1lip2 25986 dvne0 25999 plyeq0 26197 plyreres 26270 aannenlem1 26315 taylf 26347 ulmss 26383 elno2 27638 elno3 27639 cutsf 27804 madef 27848 oniso 28283 mpteleeOLD 28984 ausgrusgrb 29254 ausgrumgri 29256 usgrexmplef 29348 subuhgr 29375 subupgr 29376 subumgr 29377 subusgr 29378 upgrres 29395 umgrres 29396 hhssnv 31355 pjfi 31795 maprnin 32825 cycpmconjslem1 33237 esplyfv1 33763 measdivcstALTV 34419 sitgf 34541 eulerpartlemn 34575 reprinrn 34812 cvmlift2lem9a 35544 satff 35651 icoreresf 37727 poimirlem30 38030 poimirlem31 38031 isbnd3 38164 dihf11lem 41771 ofoafg 43812 ofoaid1 43816 ofoaid2 43817 naddcnff 43820 ntrf 44580 clsf2 44583 gneispace3 44590 gneispacef2 44593 k0004lem1 44604 dvsid 44788 stoweidlem27 46482 stoweidlem29 46484 stoweidlem31 46486 fourierdlem15 46577 mbfresmf 47194 sinnpoly 47366 ffnafv 47646 fcdmvafv2v 47711 iccpartf 47918 slotresfo 49401 |
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