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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.) |
Ref | Expression |
---|---|
f1oi | ⊢ ( I ↾ 𝐴):𝐴–1-1-onto→𝐴 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fnresi 6448 | . 2 ⊢ ( I ↾ 𝐴) Fn 𝐴 | |
2 | cnvresid 6403 | . . . 4 ⊢ ◡( I ↾ 𝐴) = ( I ↾ 𝐴) | |
3 | 2 | fneq1i 6420 | . . 3 ⊢ (◡( I ↾ 𝐴) Fn 𝐴 ↔ ( I ↾ 𝐴) Fn 𝐴) |
4 | 1, 3 | mpbir 234 | . 2 ⊢ ◡( I ↾ 𝐴) Fn 𝐴 |
5 | dff1o4 6598 | . 2 ⊢ (( I ↾ 𝐴):𝐴–1-1-onto→𝐴 ↔ (( I ↾ 𝐴) Fn 𝐴 ∧ ◡( I ↾ 𝐴) Fn 𝐴)) | |
6 | 1, 4, 5 | mpbir2an 710 | 1 ⊢ ( I ↾ 𝐴):𝐴–1-1-onto→𝐴 |
Colors of variables: wff setvar class |
Syntax hints: I cid 5424 ◡ccnv 5518 ↾ cres 5521 Fn wfn 6319 –1-1-onto→wf1o 6323 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 ax-sep 5167 ax-nul 5174 ax-pr 5295 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ral 3111 df-rex 3112 df-rab 3115 df-v 3443 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-nul 4244 df-if 4426 df-sn 4526 df-pr 4528 df-op 4532 df-br 5031 df-opab 5093 df-id 5425 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-res 5531 df-ima 5532 df-fun 6326 df-fn 6327 df-f 6328 df-f1 6329 df-fo 6330 df-f1o 6331 |
This theorem is referenced by: f1ovi 6628 fveqf1o 7037 isoid 7061 enrefg 8524 ssdomg 8538 wdomref 9020 infxpenc 9429 pwfseqlem5 10074 fproddvdsd 15676 wunndx 16496 idfucl 17143 idffth 17195 ressffth 17200 setccatid 17336 estrccatid 17374 funcestrcsetclem7 17388 funcestrcsetclem8 17389 equivestrcsetc 17394 funcsetcestrclem7 17403 funcsetcestrclem8 17404 idmhm 17957 ielefmnd 18044 sursubmefmnd 18053 injsubmefmnd 18054 idghm 18365 idresperm 18506 islinds2 20502 lindfres 20512 lindsmm 20517 mdetunilem9 21225 ssidcn 21860 resthauslem 21968 sshauslem 21977 idqtop 22311 fmid 22565 iducn 22889 mbfid 24239 dvid 24521 dvexp 24556 wilthlem2 25654 wilthlem3 25655 idmot 26331 ausgrusgrb 26958 upgrres1 27103 umgrres1 27104 usgrres1 27105 usgrexilem 27230 sizusglecusglem1 27251 pliguhgr 28269 hoif 29537 idunop 29761 idcnop 29764 elunop2 29796 fcobijfs 30485 symgcom 30777 pmtridf1o 30786 cycpmfvlem 30804 cycpmfv3 30807 cycpmcl 30808 islinds5 30983 ellspds 30984 qqhre 31371 rrhre 31372 subfacp1lem4 32543 subfacp1lem5 32544 poimirlem15 35072 poimirlem22 35079 idlaut 37392 tendoidcl 38065 tendo0co2 38084 erng1r 38291 dvalveclem 38321 dva0g 38323 dvh0g 38407 mzpresrename 39691 eldioph2lem1 39701 eldioph2lem2 39702 diophren 39754 kelac2 40009 lnrfg 40063 fundcmpsurbijinjpreimafv 43924 fundcmpsurinjimaid 43928 isomgreqve 44343 ushrisomgr 44359 uspgrsprfo 44376 idmgmhm 44408 funcringcsetcALTV2lem8 44667 funcringcsetclem8ALTV 44690 itcovalendof 45083 |
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