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Mirrors > Home > MPE Home > Th. List > mblvol | Structured version Visualization version GIF version |
Description: The volume of a measurable set is the same as its outer volume. (Contributed by Mario Carneiro, 17-Mar-2014.) |
Ref | Expression |
---|---|
mblvol | ⊢ (𝐴 ∈ dom vol → (vol‘𝐴) = (vol*‘𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | volres 24132 | . . 3 ⊢ vol = (vol* ↾ dom vol) | |
2 | 1 | fveq1i 6646 | . 2 ⊢ (vol‘𝐴) = ((vol* ↾ dom vol)‘𝐴) |
3 | fvres 6664 | . 2 ⊢ (𝐴 ∈ dom vol → ((vol* ↾ dom vol)‘𝐴) = (vol*‘𝐴)) | |
4 | 2, 3 | syl5eq 2845 | 1 ⊢ (𝐴 ∈ dom vol → (vol‘𝐴) = (vol*‘𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1538 ∈ wcel 2111 dom cdm 5519 ↾ cres 5521 ‘cfv 6324 vol*covol 24066 volcvol 24067 |
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-uni 4801 df-br 5031 df-opab 5093 df-xp 5525 df-rel 5526 df-cnv 5527 df-dm 5529 df-rn 5530 df-res 5531 df-iota 6283 df-fv 6332 df-vol 24069 |
This theorem is referenced by: volss 24137 volun 24149 volinun 24150 volfiniun 24151 voliunlem3 24156 volsup 24160 iccvolcl 24171 ovolioo 24172 volioo 24173 ioovolcl 24174 uniioovol 24183 uniioombllem4 24190 volcn 24210 volivth 24211 vitalilem4 24215 i1fima2 24283 i1fd 24285 i1f0rn 24286 itg1val2 24288 itg1ge0 24290 itg11 24295 i1fadd 24299 i1fmul 24300 itg1addlem2 24301 itg1addlem4 24303 i1fres 24309 itg10a 24314 itg1ge0a 24315 itg1climres 24318 mbfi1fseqlem4 24322 itg2const2 24345 itg2gt0 24364 itg2cnlem2 24366 ftc1a 24640 ftc1lem4 24642 itgulm 25003 areaf 25547 cntnevol 31597 volmeas 31600 mblfinlem3 35096 mblfinlem4 35097 ismblfin 35098 voliunnfl 35101 volsupnfl 35102 itg2addnclem 35108 itg2addnclem2 35109 itg2gt0cn 35112 ftc1cnnclem 35128 ftc1anclem7 35136 areacirc 35150 arearect 40165 areaquad 40166 vol0 42601 volge0 42603 volsn 42609 volicc 42640 vonvol 43301 |
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