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| Mirrors > Home > MPE Home > Th. List > f1oi | Structured version Visualization version GIF version | ||
| Description: A restriction of the identity relation is a one-to-one onto function. (Contributed by NM, 30-Apr-1998.) (Proof shortened by Andrew Salmon, 22-Oct-2011.) Avoid ax-12 2184. (Revised by TM, 10-Feb-2026.) |
| Ref | Expression |
|---|---|
| f1oi | ⊢ ( I ↾ 𝐴):𝐴–1-1-onto→𝐴 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fnresi 6621 | . 2 ⊢ ( I ↾ 𝐴) Fn 𝐴 | |
| 2 | funi 6524 | . . . 4 ⊢ Fun I | |
| 3 | cnvi 6099 | . . . . 5 ⊢ ◡ I = I | |
| 4 | 3 | funeqi 6513 | . . . 4 ⊢ (Fun ◡ I ↔ Fun I ) |
| 5 | 2, 4 | mpbir 231 | . . 3 ⊢ Fun ◡ I |
| 6 | funres11 6569 | . . 3 ⊢ (Fun ◡ I → Fun ◡( I ↾ 𝐴)) | |
| 7 | 5, 6 | ax-mp 5 | . 2 ⊢ Fun ◡( I ↾ 𝐴) |
| 8 | rnresi 6034 | . 2 ⊢ ran ( I ↾ 𝐴) = 𝐴 | |
| 9 | dff1o2 6779 | . 2 ⊢ (( I ↾ 𝐴):𝐴–1-1-onto→𝐴 ↔ (( I ↾ 𝐴) Fn 𝐴 ∧ Fun ◡( I ↾ 𝐴) ∧ ran ( I ↾ 𝐴) = 𝐴)) | |
| 10 | 1, 7, 8, 9 | mpbir3an 1342 | 1 ⊢ ( I ↾ 𝐴):𝐴–1-1-onto→𝐴 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1541 I cid 5518 ◡ccnv 5623 ran crn 5625 ↾ cres 5626 Fun wfun 6486 Fn wfn 6487 –1-1-onto→wf1o 6491 |
| 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-8 2115 ax-9 2123 ax-ext 2708 ax-sep 5241 ax-nul 5251 ax-pr 5377 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2715 df-cleq 2728 df-clel 2811 df-ral 3052 df-rex 3061 df-rab 3400 df-v 3442 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-nul 4286 df-if 4480 df-sn 4581 df-pr 4583 df-op 4587 df-br 5099 df-opab 5161 df-id 5519 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 |
| This theorem is referenced by: f1ovi 6814 fveqf1o 7248 f1ofvswap 7252 isoid 7275 enrefg 8921 ssdomg 8937 enreffi 9107 ssdomfi 9120 ssdomfi2 9121 wdomref 9477 infxpenc 9928 pwfseqlem5 10574 fproddvdsd 16262 wunndx 17122 idfucl 17805 idffth 17859 ressffth 17864 setccatid 18008 estrccatid 18055 funcestrcsetclem7 18069 funcestrcsetclem8 18070 equivestrcsetc 18075 funcsetcestrclem7 18084 funcsetcestrclem8 18085 idmgmhm 18626 idmhm 18720 ielefmnd 18812 sursubmefmnd 18821 injsubmefmnd 18822 idghm 19160 idresperm 19315 islinds2 21768 lindfres 21778 lindsmm 21783 mdetunilem9 22564 ssidcn 23199 resthauslem 23307 sshauslem 23316 idqtop 23650 fmid 23904 iducn 24226 mbfid 25592 dvid 25875 dvexp 25913 wilthlem2 27035 wilthlem3 27036 idmot 28609 ausgrusgrb 29238 upgrres1 29386 umgrres1 29387 usgrres1 29388 usgrexilem 29513 sizusglecusglem1 29535 pliguhgr 30561 hoif 31829 idunop 32053 idcnop 32056 elunop2 32088 fcobijfs 32800 fcobijfs2 32801 symgcom 33165 fzo0pmtrlast 33174 pmtridf1o 33176 cycpmfvlem 33194 cycpmfv3 33197 cycpmcl 33198 islinds5 33448 ellspds 33449 qqhre 34177 rrhre 34178 subfacp1lem4 35377 subfacp1lem5 35378 poimirlem15 37836 poimirlem22 37843 idlaut 40356 tendoidcl 41029 tendo0co2 41048 erng1r 41255 dvalveclem 41285 dva0g 41287 dvh0g 41371 mzpresrename 42992 eldioph2lem1 43002 eldioph2lem2 43003 diophren 43055 kelac2 43307 lnrfg 43361 fundcmpsurbijinjpreimafv 47653 fundcmpsurinjimaid 47657 grimidvtxedg 48131 ushggricedg 48173 stgrusgra 48205 grlicref 48258 gpgusgra 48303 gpg5grlim 48339 uspgrsprfo 48394 funcringcsetcALTV2lem8 48543 funcringcsetclem8ALTV 48566 itcovalendof 48915 tposidf1o 49132 idfu1stf1o 49344 imaidfu 49355 idfth 49403 idsubc 49405 fucoppc 49655 oduoppcciso 49811 |
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