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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 2736 | . . 3 ⊢ dom 𝐴 = dom 𝐴 | |
| 2 | 1 | biantru 529 | . 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 278 | 1 ⊢ (Fun 𝐴 ↔ 𝐴 Fn dom 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 206 ∧ wa 395 = wceq 1541 dom cdm 5624 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 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-9 2123 ax-ext 2708 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-ex 1781 df-cleq 2728 df-fn 6495 |
| This theorem is referenced by: funfnd 6523 funssxp 6690 funforn 6753 funbrfvb 6887 funopfvb 6888 ssimaex 6919 fvco 6932 fvco4i 6935 eqfunfv 6981 fvimacnvi 6997 unpreima 7008 respreima 7011 elrnrexdm 7034 elrnrexdmb 7035 ffvresb 7070 funiun 7092 funressn 7104 funresdfunsn 7135 funex 7165 elunirn 7197 suppval1 8108 funsssuppss 8132 smores 8284 rdgsucg 8354 rdglimg 8356 imafiOLD 9216 fundmfibi 9236 residfi 9238 mptfi 9251 ordtypelem6 9428 ordtypelem7 9429 harwdom 9496 ackbij2 10152 mptct 10448 smobeth 10497 hashkf 14255 hashfun 14360 fclim 15476 coapm 17995 psgnghm 21535 lindfrn 21776 elno3 27623 noextenddif 27636 noextendlt 27637 noextendgt 27638 nosupbnd2lem1 27683 noetasuplem4 27704 ausgrumgri 29240 dfnbgr3 29411 wlkiswwlks1 29940 vdn0conngrumgrv2 30271 hlimf 31312 adj1o 31969 abrexdomjm 32582 iunpreima 32639 fresf1o 32709 unipreima 32721 xppreima 32723 rnressnsn 32756 suppiniseg 32765 fdifsuppconst 32768 ressupprn 32769 mptctf 32795 orvcval2 34616 fineqvac 35272 fullfunfnv 36140 fullfunfv 36141 abrexdom 37931 diaf11N 41309 dibf11N 41421 imadomfi 42256 gneispace3 44374 fresfo 47294 funbrafvb 47402 funopafvb 47403 funbrafv22b 47496 funopafv2b 47497 dfclnbgr3 48072 grimuhgr 48133 |
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