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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 6842, dff3 6843, and dff4 6844. (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 6320 | . 2 wff 𝐹:𝐴⟶𝐵 |
5 | 3, 1 | wfn 6319 | . . 3 wff 𝐹 Fn 𝐴 |
6 | 3 | crn 5520 | . . . 4 class ran 𝐹 |
7 | 6, 2 | wss 3881 | . . 3 wff ran 𝐹 ⊆ 𝐵 |
8 | 5, 7 | wa 399 | . 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 referenced by: feq1 6468 feq2 6469 feq3 6470 nff 6483 sbcfg 6485 ffn 6487 dffn2 6489 frn 6493 dffn3 6499 fss 6501 fco 6505 funssxp 6509 fdmrn 6512 fun 6514 fnfco 6517 fssres 6518 fcoi2 6527 fint 6532 fin 6533 f0 6534 fconst 6539 f1ssr 6556 fof 6565 dff1o2 6595 dff2 6842 dff3 6843 fmpt 6851 ffnfv 6859 ffvresb 6865 idref 6885 fpr 6893 dff1o6 7010 fliftf 7047 fiun 7626 f1iun 7627 ffoss 7629 1stcof 7701 2ndcof 7702 smores 7972 smores2 7974 iordsmo 7977 sbthlem9 8619 inf3lem6 9080 alephsmo 9513 alephsing 9687 axdc3lem2 9862 smobeth 9997 fpwwe2lem11 10051 gruiun 10210 gruima 10213 nqerf 10341 om2uzf1oi 13316 fclim 14902 invf 17030 funcres2b 17159 funcres2c 17163 hofcllem 17500 hofcl 17501 gsumval2 17888 resmhm2b 17979 frmdss2 18020 gsumval3a 19016 subgdmdprd 19149 srgfcl 19258 lsslindf 20519 indlcim 20529 cnrest2 21891 lmss 21903 conncn 22031 txflf 22611 cnextf 22671 clsnsg 22715 tgpconncomp 22718 psmetxrge0 22920 causs 23902 ellimc2 24480 perfdvf 24506 c1lip2 24601 dvne0 24614 plyeq0 24808 plyreres 24879 aannenlem1 24924 taylf 24956 ulmss 24992 mptelee 26689 ausgrusgrb 26958 ausgrumgri 26960 usgrexmplef 27049 subuhgr 27076 subupgr 27077 subumgr 27078 subusgr 27079 upgrres 27096 umgrres 27097 hhssnv 29047 pjfi 29487 maprnin 30493 cycpmconjslem1 30846 measdivcstALTV 31594 sitgf 31715 eulerpartlemn 31749 reprinrn 31999 cvmlift2lem9a 32663 satff 32770 elno2 33274 elno3 33275 scutf 33386 icoreresf 34769 poimirlem30 35087 poimirlem31 35088 isbnd3 35222 dihf11lem 38562 ntrf 40826 clsf2 40829 gneispace3 40836 gneispacef2 40839 k0004lem1 40850 dvsid 41035 stoweidlem27 42669 stoweidlem29 42671 stoweidlem31 42673 fourierdlem15 42764 mbfresmf 43373 ffnafv 43727 frnvafv2v 43792 iccpartf 43948 resmgmhm2b 44420 |
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