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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 7082, dff3 7083, and dff4 7084. (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 6519 | . 2 wff 𝐹:𝐴⟶𝐵 |
| 5 | 3, 1 | wfn 6518 | . . 3 wff 𝐹 Fn 𝐴 |
| 6 | 3 | crn 5650 | . . . 4 class ran 𝐹 |
| 7 | 6, 2 | wss 3906 | . . 3 wff ran 𝐹 ⊆ 𝐵 |
| 8 | 5, 7 | wa 399 | . 2 wff (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵) |
| 9 | 4, 8 | wb 208 | 1 wff (𝐹:𝐴⟶𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵)) |
| Colors of variables: wff setvar class |
| This definition is referenced by: feq1 6671 feq2 6672 feq3 6673 nff 6689 sbcfg 6691 ffn 6693 dffn2 6695 frn 6701 dffn3 6706 ffrnb 6708 fss 6710 fcof 6717 funssxp 6722 fdmrn 6725 fun 6728 fnfco 6731 fssres 6732 fcoi2 6741 fint 6745 fin 6746 f0 6747 fconst 6752 f1ssr 6770 fof 6780 dff1o2 6814 dff2 7082 dff3 7083 fmpt 7093 ffnfv 7102 ffvresb 7109 idref 7130 fpr 7139 dff1o6 7261 fliftf 7301 fiun 7926 f1iun 7927 ffoss 7929 1stcof 8002 2ndcof 8003 smores 8325 smores2 8327 iordsmo 8330 sbthlem9 9069 inf3lem6 9590 alephsmo 10060 alephsing 10235 axdc3lem2 10410 smobeth 10546 fpwwe2lem10 10600 gruiun 10759 gruima 10762 nqerf 10890 om2uzf1oi 13968 fclim 15582 invf 17803 funcres2b 17932 funcres2c 17938 hofcllem 18292 hofcl 18293 nfchnd 18645 gsumval2 18722 resmgmhm2b 18749 resmhm2b 18858 frmdss2 18899 gsumval3a 19945 subgdmdprd 20078 srgfcl 20248 lsslindf 21884 indlcim 21894 cnrest2 23348 lmss 23360 conncn 23488 txflf 24068 cnextf 24128 clsnsg 24172 tgpconncomp 24175 psmetxrge0 24375 causs 25362 ellimc2 25941 perfdvf 25967 c1lip2 26062 dvne0 26075 plyeq0 26273 plyreres 26349 aannenlem1 26394 taylf 26426 ulmss 26462 elno2 27720 elno3 27721 cutsf 27887 madef 27931 oniso 28366 mpteleeOLD 29098 ausgrusgrb 29368 ausgrumgri 29370 usgrexmplef 29462 subuhgr 29489 subupgr 29490 subumgr 29491 subusgr 29492 upgrres 29509 umgrres 29510 hhssnv 31469 pjfi 31909 maprnin 32935 cycpmconjslem1 33336 esplyfv1 33868 measdivcstALTV 34524 sitgf 34646 eulerpartlemn 34680 reprinrn 34914 cvmlift2lem9a 35658 satff 35765 icoreresf 37851 poimirlem30 38154 poimirlem31 38155 isbnd3 38288 dihf11lem 41895 ofoafg 43936 ofoaid1 43940 ofoaid2 43941 naddcnff 43944 ntrf 44704 clsf2 44707 gneispace3 44714 gneispacef2 44717 k0004lem1 44728 dvsid 44912 stoweidlem27 46606 stoweidlem29 46608 stoweidlem31 46610 fourierdlem15 46701 mbfresmf 47318 sinnpoly 47490 ffnafv 47770 fcdmvafv2v 47835 iccpartf 48042 slotresfo 49525 |
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