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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 3993 | . . 3 ⊢ 𝐴 ⊆ V | |
2 | dmi 5793 | . . 3 ⊢ dom I = V | |
3 | 1, 2 | sseqtrri 4006 | . 2 ⊢ 𝐴 ⊆ dom I |
4 | ssdmres 5878 | . 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 1537 Vcvv 3496 ⊆ wss 3938 I cid 5461 dom cdm 5557 ↾ cres 5559 |
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 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-sep 5205 ax-nul 5212 ax-pr 5332 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ral 3145 df-rex 3146 df-rab 3149 df-v 3498 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-nul 4294 df-if 4470 df-sn 4570 df-pr 4572 df-op 4576 df-br 5069 df-opab 5131 df-id 5462 df-xp 5563 df-rel 5564 df-dm 5567 df-res 5569 |
This theorem is referenced by: fnresiOLD 6479 iordsmo 7996 residfi 8807 hartogslem1 9008 dfac9 9564 hsmexlem5 9854 relexpdmg 14403 relexpfld 14410 relexpaddg 14414 dirdm 17846 islinds2 20959 lindsind2 20965 f1linds 20971 wilthlem3 25649 ausgrusgrb 26952 usgrres1 27099 usgrexilem 27224 filnetlem3 33730 filnetlem4 33731 rclexi 39982 cnvrcl0 39992 dfrtrcl5 39996 dfrcl2 40026 brfvrcld2 40044 iunrelexp0 40054 relexpiidm 40056 relexp01min 40065 ushrisomgr 44013 uspgrsprfo 44030 |
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