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| Mirrors > Home > MPE Home > Th. List > df-fn | Structured version Visualization version GIF version | ||
| Description: Define a function with domain. Definition 6.15(1) of [TakeutiZaring] p. 27. For alternate definitions, see dffn2 6711, dffn3 6722, dffn4 6802, and dffn5 6943. (Contributed by NM, 1-Aug-1994.) |
| Ref | Expression |
|---|---|
| df-fn | ⊢ (𝐴 Fn 𝐵 ↔ (Fun 𝐴 ∧ dom 𝐴 = 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cA | . . 3 class 𝐴 | |
| 2 | cB | . . 3 class 𝐵 | |
| 3 | 1, 2 | wfn 6533 | . 2 wff 𝐴 Fn 𝐵 |
| 4 | 1 | wfun 6532 | . . 3 wff Fun 𝐴 |
| 5 | 1 | cdm 5650 | . . . 4 class dom 𝐴 |
| 6 | 5, 2 | wceq 1569 | . . 3 wff dom 𝐴 = 𝐵 |
| 7 | 4, 6 | wa 401 | . 2 wff (Fun 𝐴 ∧ dom 𝐴 = 𝐵) |
| 8 | 3, 7 | wb 209 | 1 wff (𝐴 Fn 𝐵 ↔ (Fun 𝐴 ∧ dom 𝐴 = 𝐵)) |
| Colors of variables: wff setvar class |
| This definition is used by: funfn 6570 fnsng 6592 fnprg 6599 fntpg 6600 fntp 6601 fncnv 6613 fneq1 6630 fneq2 6631 nffn 6638 fnfun 6639 fndm 6642 fnun 6653 fnssresb 6661 fnres 6666 idfn 6667 fn0 6670 mptfnf 6674 fnopabg 6676 sbcfng 6706 fdmrn 6741 fcoi1 6756 f00 6764 f1cnvcnv 6789 fores 6806 dff1o4 6833 foimacnv 6842 funfv 6972 fvimacnvALT 7056 respreima 7065 dff3 7100 fpr 7158 fnsnbOLD 7171 fnprb 7214 fnex 7223 fliftf 7323 fnoprabg 7543 fiun 7955 f1iun 7956 f1oweALT 7984 curry1 8115 curry2 8118 tposfn2 8265 frrlem11 8314 frrlem12 8315 fpr1 8321 tfrlem10 8395 tfr1 8405 frfnom 8443 undifixp 8962 sbthlem9 9114 fodomr 9147 fodomfir 9319 frr1 9763 rankf 9802 cardf2 10024 axdc3lem2 10529 nqerf 11015 axaddf 11230 axmulf 11231 uzrdgfni 14101 hashkf 14476 shftfn 15226 sgnfo 15252 imasaddfnlem 17700 imasvscafn 17709 nfchnd 18785 mgmn0plusgf 18827 degenmgmnfn 19136 fntopon 23242 cnextf 24385 ftc1cn 26363 nofnbday 28009 cutsf 28178 oniso 28657 noseqrdgfn 28692 bdayn0sf1o 28756 grporn 31123 ffsrn 33362 measdivcstALTV 34900 bnj1422 35509 rncardr1prc 35800 acwer1prc 35802 satff 36217 fnsingle 36723 fnimage 36733 imageval 36734 dfrecs2 36756 dfrdg4 36757 bj-isrvec 38258 ftc1cnnc 38653 modelaxreplem1 46010 fnresfnco 48153 funcoressn 48154 afvco2 48288 |
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