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Mirrors > Home > MPE Home > Th. List > dmresi | Structured version Visualization version GIF version |
Description: The domain of a restricted identity function. (Contributed by NM, 27-Aug-2004.) |
Ref | Expression |
---|---|
dmresi | ⊢ dom ( I ↾ 𝐴) = 𝐴 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ssv 3990 | . . 3 ⊢ 𝐴 ⊆ V | |
2 | dmi 5785 | . . 3 ⊢ dom I = V | |
3 | 1, 2 | sseqtrri 4003 | . 2 ⊢ 𝐴 ⊆ dom I |
4 | ssdmres 5870 | . 2 ⊢ (𝐴 ⊆ dom I ↔ dom ( I ↾ 𝐴) = 𝐴) | |
5 | 3, 4 | mpbi 232 | 1 ⊢ dom ( I ↾ 𝐴) = 𝐴 |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1533 Vcvv 3494 ⊆ wss 3935 I cid 5453 dom cdm 5549 ↾ cres 5551 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2157 ax-12 2173 ax-ext 2793 ax-sep 5195 ax-nul 5202 ax-pr 5321 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 df-dif 3938 df-un 3940 df-in 3942 df-ss 3951 df-nul 4291 df-if 4467 df-sn 4561 df-pr 4563 df-op 4567 df-br 5059 df-opab 5121 df-id 5454 df-xp 5555 df-rel 5556 df-dm 5559 df-res 5561 |
This theorem is referenced by: fnresiOLD 6471 iordsmo 7988 residfi 8799 hartogslem1 9000 dfac9 9556 hsmexlem5 9846 relexpdmg 14395 relexpfld 14402 relexpaddg 14406 dirdm 17838 islinds2 20951 lindsind2 20957 f1linds 20963 wilthlem3 25641 ausgrusgrb 26944 usgrres1 27091 usgrexilem 27216 filnetlem3 33723 filnetlem4 33724 rclexi 39968 cnvrcl0 39978 dfrtrcl5 39982 dfrcl2 40012 brfvrcld2 40030 iunrelexp0 40040 relexpiidm 40042 relexp01min 40051 ushrisomgr 44000 uspgrsprfo 44017 |
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