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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 7095, dff3 7096, and dff4 7097. (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 6533 | . 2 wff 𝐹:𝐴⟶𝐵 |
| 5 | 3, 1 | wfn 6532 | . . 3 wff 𝐹 Fn 𝐴 |
| 6 | 3 | crn 5660 | . . . 4 class ran 𝐹 |
| 7 | 6, 2 | wss 3902 | . . 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 6684 feq2 6685 feq3 6686 nff 6702 sbcfg 6704 ffn 6706 dffn2 6708 frn 6714 dffn3 6719 ffrnb 6721 fss 6723 fcof 6730 funssxp 6735 fdmrn 6738 fun 6741 fnfco 6744 fssres 6745 fcoi2 6754 fint 6758 fin 6759 f0 6760 fconst 6765 f1ssr 6783 fof 6793 dff1o2 6827 dff2 7095 dff3 7096 fmpt 7106 ffnfv 7115 ffvresb 7122 idref 7145 fpr 7154 dff1o6 7279 fliftf 7319 fiun 7943 f1iun 7944 ffoss 7946 1stcof 8019 2ndcof 8020 smores 8344 smores2 8346 iordsmo 8349 sbthlem9 9096 inf3lem6 9615 alephsmo 10108 alephsing 10281 axdc3lem2 10456 smobeth 10598 fpwwe2lem10 10652 gruiun 10811 gruima 10814 nqerf 10942 om2uzf1oi 14019 fclim 15642 invf 17861 funcres2b 17990 funcres2c 17996 hofcllem 18350 hofcl 18351 nfchnd 18703 mgmn0plusgf 18745 gsumval2 18790 resmgmhm2b 18817 resmhm2b 18932 frmdss2 18973 gsumval3a 20031 subgdmdprd 20164 srgfcl 20336 lsslindf 22044 indlcim 22054 cnrest2 23512 lmss 23524 conncn 23652 txflf 24233 cnextf 24293 clsnsg 24337 tgpconncomp 24340 psmetxrge0 24540 causs 25527 ellimc2 26106 perfdvf 26132 c1lip2 26227 dvne0 26240 plyeq0 26438 plyreres 26514 aannenlem1 26561 taylf 26594 ulmss 26630 elno2 27888 elno3 27889 cutsf 28055 madef 28099 oniso 28534 mpteleeOLD 29338 ausgrusgrb 29611 ausgrumgri 29613 usgrexmplef 29705 subuhgr 29732 subupgr 29733 subumgr 29734 subusgr 29735 upgrres 29752 umgrres 29753 hhssnv 31731 pjfi 32171 maprnin 33189 cycpmconjslem1 33581 esplyfv1 34066 measdivcstALTV 34723 sitgf 34845 eulerpartlemn 34879 reprinrn 35113 cvmlift2lem9a 35869 satff 35976 icoreresf 38093 poimirlem30 38386 poimirlem31 38387 isbnd3 38521 dihf11lem 42126 ofoafg 44182 ofoaid1 44186 ofoaid2 44187 naddcnff 44190 ntrf 44950 clsf2 44953 gneispace3 44960 gneispacef2 44963 k0004lem1 44974 dvsid 45142 stoweidlem27 46842 stoweidlem29 46844 stoweidlem31 46846 fourierdlem15 46937 mbfresmf 47554 ffnafv 48046 fcdmvafv2v 48111 iccpartf 48318 slotresfo 49812 |
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