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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 7042, dff3 7043, and dff4 7044. (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 6486 | . 2 wff 𝐹:𝐴⟶𝐵 |
| 5 | 3, 1 | wfn 6485 | . . 3 wff 𝐹 Fn 𝐴 |
| 6 | 3 | crn 5623 | . . . 4 class ran 𝐹 |
| 7 | 6, 2 | wss 3899 | . . 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 6638 feq2 6639 feq3 6640 nff 6656 sbcfg 6658 ffn 6660 dffn2 6662 frn 6667 dffn3 6672 ffrnb 6674 fss 6676 fcof 6683 funssxp 6688 fdmrn 6691 fun 6694 fnfco 6697 fssres 6698 fcoi2 6707 fint 6711 fin 6712 f0 6713 fconst 6718 f1ssr 6734 fof 6744 dff1o2 6777 dff2 7042 dff3 7043 fmpt 7053 ffnfv 7062 ffvresb 7068 idref 7089 fpr 7097 dff1o6 7219 fliftf 7259 fiun 7885 f1iun 7886 ffoss 7888 1stcof 7961 2ndcof 7962 smores 8282 smores2 8284 iordsmo 8287 sbthlem9 9021 inf3lem6 9540 alephsmo 10010 alephsing 10184 axdc3lem2 10359 smobeth 10495 fpwwe2lem10 10549 gruiun 10708 gruima 10711 nqerf 10839 om2uzf1oi 13874 fclim 15474 invf 17690 funcres2b 17819 funcres2c 17825 hofcllem 18179 hofcl 18180 nfchnd 18532 gsumval2 18609 resmgmhm2b 18636 resmhm2b 18745 frmdss2 18786 gsumval3a 19830 subgdmdprd 19963 srgfcl 20129 lsslindf 21783 indlcim 21793 cnrest2 23228 lmss 23240 conncn 23368 txflf 23948 cnextf 24008 clsnsg 24052 tgpconncomp 24055 psmetxrge0 24255 causs 25252 ellimc2 25832 perfdvf 25858 c1lip2 25957 dvne0 25970 plyeq0 26170 plyreres 26244 aannenlem1 26290 taylf 26322 ulmss 26360 elno2 27620 elno3 27621 scutf 27780 madef 27824 onsiso 28236 mpteleeOLD 28917 ausgrusgrb 29187 ausgrumgri 29189 usgrexmplef 29281 subuhgr 29308 subupgr 29309 subumgr 29310 subusgr 29311 upgrres 29328 umgrres 29329 hhssnv 31288 pjfi 31728 maprnin 32759 cycpmconjslem1 33185 esplyfv1 33676 measdivcstALTV 34331 sitgf 34453 eulerpartlemn 34487 reprinrn 34724 cvmlift2lem9a 35446 satff 35553 icoreresf 37496 poimirlem30 37790 poimirlem31 37791 isbnd3 37924 dihf11lem 41465 ofoafg 43538 ofoaid1 43542 ofoaid2 43543 naddcnff 43546 ntrf 44306 clsf2 44309 gneispace3 44316 gneispacef2 44319 k0004lem1 44330 dvsid 44514 stoweidlem27 46213 stoweidlem29 46215 stoweidlem31 46217 fourierdlem15 46308 mbfresmf 46925 sinnpoly 47079 ffnafv 47359 fcdmvafv2v 47424 iccpartf 47619 slotresfo 49086 |
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