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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 2730 | . . 3 ⊢ dom 𝐴 = dom 𝐴 | |
| 2 | 1 | biantru 529 | . 2 ⊢ (Fun 𝐴 ↔ (Fun 𝐴 ∧ dom 𝐴 = dom 𝐴)) |
| 3 | df-fn 6480 | . 2 ⊢ (𝐴 Fn dom 𝐴 ↔ (Fun 𝐴 ∧ dom 𝐴 = dom 𝐴)) | |
| 4 | 2, 3 | bitr4i 278 | 1 ⊢ (Fun 𝐴 ↔ 𝐴 Fn dom 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 206 ∧ wa 395 = wceq 1541 dom cdm 5614 Fun wfun 6471 Fn wfn 6472 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-9 2120 ax-ext 2702 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-ex 1781 df-cleq 2722 df-fn 6480 |
| This theorem is referenced by: funfnd 6508 funssxp 6675 funforn 6738 funbrfvb 6870 funopfvb 6871 ssimaex 6902 fvco 6915 fvco4i 6918 eqfunfv 6964 fvimacnvi 6980 unpreima 6991 respreima 6994 elrnrexdm 7017 elrnrexdmb 7018 ffvresb 7053 funiun 7075 funressn 7087 funresdfunsn 7118 funex 7148 elunirn 7180 suppval1 8091 funsssuppss 8115 smores 8267 rdgsucg 8337 rdglimg 8339 imafiOLD 9195 fundmfibi 9215 residfi 9217 mptfi 9230 ordtypelem6 9404 ordtypelem7 9405 harwdom 9472 ackbij2 10125 mptct 10421 smobeth 10469 hashkf 14231 hashfun 14336 fclim 15452 coapm 17970 psgnghm 21510 lindfrn 21751 elno3 27587 noextenddif 27600 noextendlt 27601 noextendgt 27602 nosupbnd2lem1 27647 noetasuplem4 27668 ausgrumgri 29138 dfnbgr3 29309 wlkiswwlks1 29838 vdn0conngrumgrv2 30166 hlimf 31207 adj1o 31864 abrexdomjm 32477 iunpreima 32534 fresf1o 32603 unipreima 32615 xppreima 32617 suppiniseg 32657 fdifsuppconst 32660 ressupprn 32661 mptctf 32689 orvcval2 34462 fineqvac 35107 fullfunfnv 35959 fullfunfv 35960 abrexdom 37749 diaf11N 41067 dibf11N 41179 imadomfi 42014 gneispace3 44145 fresfo 47058 funbrafvb 47166 funopafvb 47167 funbrafv22b 47260 funopafv2b 47261 dfclnbgr3 47836 grimuhgr 47897 |
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