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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 3939 | . . 3 ⊢ 𝐴 ⊆ V | |
2 | dmi 5755 | . . 3 ⊢ dom I = V | |
3 | 1, 2 | sseqtrri 3952 | . 2 ⊢ 𝐴 ⊆ dom I |
4 | ssdmres 5841 | . 2 ⊢ (𝐴 ⊆ dom I ↔ dom ( I ↾ 𝐴) = 𝐴) | |
5 | 3, 4 | mpbi 233 | 1 ⊢ dom ( I ↾ 𝐴) = 𝐴 |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1538 Vcvv 3441 ⊆ wss 3881 I cid 5424 dom cdm 5519 ↾ cres 5521 |
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-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-dm 5529 df-res 5531 |
This theorem is referenced by: fnresiOLD 6449 iordsmo 7977 residfi 8789 hartogslem1 8990 dfac9 9547 hsmexlem5 9841 relexpdmg 14393 relexpfld 14400 relexpaddg 14404 dirdm 17836 islinds2 20502 lindsind2 20508 f1linds 20514 wilthlem3 25655 ausgrusgrb 26958 usgrres1 27105 usgrexilem 27230 filnetlem3 33841 filnetlem4 33842 rclexi 40315 cnvrcl0 40325 dfrtrcl5 40329 dfrcl2 40375 brfvrcld2 40393 iunrelexp0 40403 relexpiidm 40405 relexp01min 40414 ushrisomgr 44359 uspgrsprfo 44376 |
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