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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 7046, dff3 7047, and dff4 7048. (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 6489 | . 2 wff 𝐹:𝐴⟶𝐵 |
| 5 | 3, 1 | wfn 6488 | . . 3 wff 𝐹 Fn 𝐴 |
| 6 | 3 | crn 5626 | . . . 4 class ran 𝐹 |
| 7 | 6, 2 | wss 3902 | . . 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 6641 feq2 6642 feq3 6643 nff 6659 sbcfg 6661 ffn 6663 dffn2 6665 frn 6670 dffn3 6675 ffrnb 6677 fss 6679 fcof 6686 funssxp 6691 fdmrn 6694 fun 6697 fnfco 6700 fssres 6701 fcoi2 6710 fint 6714 fin 6715 f0 6716 fconst 6721 f1ssr 6737 fof 6747 dff1o2 6780 dff2 7046 dff3 7047 fmpt 7057 ffnfv 7066 ffvresb 7072 idref 7093 fpr 7101 dff1o6 7223 fliftf 7263 fiun 7889 f1iun 7890 ffoss 7892 1stcof 7965 2ndcof 7966 smores 8286 smores2 8288 iordsmo 8291 sbthlem9 9027 inf3lem6 9546 alephsmo 10016 alephsing 10190 axdc3lem2 10365 smobeth 10501 fpwwe2lem10 10555 gruiun 10714 gruima 10717 nqerf 10845 om2uzf1oi 13880 fclim 15480 invf 17696 funcres2b 17825 funcres2c 17831 hofcllem 18185 hofcl 18186 nfchnd 18538 gsumval2 18615 resmgmhm2b 18642 resmhm2b 18751 frmdss2 18792 gsumval3a 19836 subgdmdprd 19969 srgfcl 20135 lsslindf 21789 indlcim 21799 cnrest2 23234 lmss 23246 conncn 23374 txflf 23954 cnextf 24014 clsnsg 24058 tgpconncomp 24061 psmetxrge0 24261 causs 25258 ellimc2 25838 perfdvf 25864 c1lip2 25963 dvne0 25976 plyeq0 26176 plyreres 26250 aannenlem1 26296 taylf 26328 ulmss 26366 elno2 27626 elno3 27627 cutsf 27792 madef 27836 oniso 28271 mpteleeOLD 28972 ausgrusgrb 29242 ausgrumgri 29244 usgrexmplef 29336 subuhgr 29363 subupgr 29364 subumgr 29365 subusgr 29366 upgrres 29383 umgrres 29384 hhssnv 31343 pjfi 31783 maprnin 32812 cycpmconjslem1 33238 esplyfv1 33729 measdivcstALTV 34384 sitgf 34506 eulerpartlemn 34540 reprinrn 34777 cvmlift2lem9a 35499 satff 35606 icoreresf 37559 poimirlem30 37853 poimirlem31 37854 isbnd3 37987 dihf11lem 41594 ofoafg 43663 ofoaid1 43667 ofoaid2 43668 naddcnff 43671 ntrf 44431 clsf2 44434 gneispace3 44441 gneispacef2 44444 k0004lem1 44455 dvsid 44639 stoweidlem27 46338 stoweidlem29 46340 stoweidlem31 46342 fourierdlem15 46433 mbfresmf 47050 sinnpoly 47204 ffnafv 47484 fcdmvafv2v 47549 iccpartf 47744 slotresfo 49211 |
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