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| Mirrors > Home > MPE Home > Th. List > funfn | Structured version Visualization version GIF version | ||
| Description: A class is a function if and only if it is a function on its domain. (Contributed by NM, 13-Aug-2004.) |
| Ref | Expression |
|---|---|
| funfn | ⊢ (Fun 𝐴 ↔ 𝐴 Fn dom 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqid 2740 | . . 3 ⊢ dom 𝐴 = dom 𝐴 | |
| 2 | 1 | biantru 534 | . 2 ⊢ (Fun 𝐴 ↔ (Fun 𝐴 ∧ dom 𝐴 = dom 𝐴)) |
| 3 | df-fn 6495 | . 2 ⊢ (𝐴 Fn dom 𝐴 ↔ (Fun 𝐴 ∧ dom 𝐴 = dom 𝐴)) | |
| 4 | 2, 3 | bitr4i 279 | 1 ⊢ (Fun 𝐴 ↔ 𝐴 Fn dom 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 207 ∧ wa 396 = wceq 1547 dom cdm 5625 Fun wfun 6486 Fn wfn 6487 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-9 2129 ax-ext 2712 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-ex 1787 df-cleq 2732 df-fn 6495 |
| This theorem is referenced by: funfnd 6523 funssxp 6690 funforn 6753 funbrfvb 6887 funopfvb 6888 ssimaex 6919 fvco 6932 fvco4i 6936 eqfunfv 6984 fvimacnvi 7000 unpreima 7011 respreima 7014 elrnrexdm 7037 elrnrexdmb 7038 ffvresb 7074 funiun 7096 funressn 7109 funresdfunsn 7140 funex 7170 elunirn 7202 suppval1 8113 funsssuppss 8137 smores 8289 rdgsucg 8359 rdglimg 8361 imafiOLD 9223 fundmfibi 9243 residfi 9245 mptfi 9258 ordtypelem6 9435 ordtypelem7 9436 harwdom 9503 ackbij2 10162 mptct 10458 smobeth 10507 hashkf 14292 hashfun 14397 fclim 15513 coapm 18036 psgnghm 21562 lindfrn 21803 elno3 27644 noextenddif 27657 noextendlt 27658 noextendgt 27659 nosupbnd2lem1 27704 noetasuplem4 27725 ausgrumgri 29261 dfnbgr3 29432 wlkiswwlks1 29960 vdn0conngrumgrv2 30291 hlimf 31333 adj1o 31990 abrexdomjm 32602 iunpreima 32660 fresf1o 32730 unipreima 32742 xppreima 32744 rnressnsn 32776 suppiniseg 32785 fdifsuppconst 32788 ressupprn 32789 mptctf 32815 orvcval2 34650 fineqvac 35304 fullfunfnv 36181 fullfunfv 36182 abrexdom 38104 diaf11N 41548 dibf11N 41660 imadomfi 42494 gneispace3 44584 fresfo 47518 funbrafvb 47626 funopafvb 47627 funbrafv22b 47720 funopafv2b 47721 dfclnbgr3 48324 grimuhgr 48385 |
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