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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 7120, dff3 7121, and dff4 7122. (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 6551 | . 2 wff 𝐹:𝐴⟶𝐵 |
| 5 | 3, 1 | wfn 6550 | . . 3 wff 𝐹 Fn 𝐴 |
| 6 | 3 | crn 5656 | . . . 4 class ran 𝐹 |
| 7 | 6, 2 | wss 3900 | . . 3 wff ran 𝐹 ⊆ 𝐵 |
| 8 | 5, 7 | wa 401 | . 2 wff (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵) |
| 9 | 4, 8 | wb 209 | 1 wff (𝐹:𝐴⟶𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵)) |
| Colors of variables: wff setvar class |
| This definition is used by: feq1 6706 feq2 6707 feq3 6708 nff 6724 sbcfg 6726 ffn 6728 dffn2 6730 frn 6736 dffn3 6741 ffrnb 6743 fss 6745 fcof 6752 funssxp 6757 fdmrn 6760 fun 6763 fnfco 6766 fssres 6767 fcoi2 6776 fint 6780 fin 6781 f0 6782 fconst 6787 f1ssr 6805 fof 6815 dff1o2 6849 dff2 7120 dff3 7121 fmpt 7131 ffnfv 7140 ffvresb 7147 idref 7170 fpr 7179 dff1o6 7303 fliftf 7343 fiun 7976 f1iun 7977 ffoss 7979 1stcof 8052 2ndcof 8053 smores 8385 smores2 8387 iordsmo 8390 sbthlem9 9139 inf3lem6 9658 alephsmo 10205 alephsing 10378 axdc3lem2 10553 smobeth 10695 fpwwe2lem10 10749 gruiun 10908 gruima 10911 nqerf 11039 om2uzf1oi 14120 fclim 15746 invf 17969 funcres2b 18098 funcres2c 18104 hofcllem 18458 hofcl 18459 nfchnd 18811 mgmn0plusgf 18853 gsumval2 18901 resmgmhm2b 18928 resmhm2b 19044 frmdss2 19085 gsumval3a 20144 subgdmdprd 20277 srgfcl 20449 lsslindf 22163 indlcim 22173 cnrest2 23631 lmss 23643 conncn 23771 txflf 24352 cnextf 24412 clsnsg 24456 tgpconncomp 24459 psmetxrge0 24659 causs 25646 ellimc2 26224 perfdvf 26250 c1lip2 26345 dvne0 26358 plyeq0 26557 plyreres 26631 aannenlem1 26682 taylf 26715 ulmss 26751 elno2 28038 elno3 28039 cutsf 28205 madef 28249 oniso 28684 mpteleeOLD 29500 ausgrusgrb 29773 ausgrumgri 29775 usgrexmplef 29867 subuhgr 29894 subupgr 29895 subumgr 29896 subusgr 29897 upgrres 29914 umgrres 29915 hhssnv 31893 pjfi 32333 maprnin 33390 cycpmconjslem1 33782 esplyfv1 34268 measdivcstALTV 34925 sitgf 35046 eulerpartlemn 35080 reprinrn 35314 cvmlift2lem9a 36234 satff 36341 icoreresf 38466 poimirlem30 38759 poimirlem31 38760 isbnd3 38909 dihf11lem 42514 ofoafg 44546 ofoaid1 44550 ofoaid2 44551 naddcnff 44554 ntrf 45313 clsf2 45316 gneispace3 45323 gneispacef2 45326 k0004lem1 45337 dvsid 45505 stoweidlem27 47240 stoweidlem29 47242 stoweidlem31 47244 fourierdlem15 47335 mbfresmf 47952 ffnafv 48444 fcdmvafv2v 48509 iccpartf 48716 slotresfo 50216 |
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