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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 25849 | . . 3 ⊢ vol = (vol* ↾ dom vol) | |
| 2 | 1 | fveq1i 6886 | . 2 ⊢ (vol‘𝐴) = ((vol* ↾ dom vol)‘𝐴) |
| 3 | fvres 6904 | . 2 ⊢ (𝐴 ∈ dom vol → ((vol* ↾ dom vol)‘𝐴) = (vol*‘𝐴)) | |
| 4 | 2, 3 | eqtrid 2808 | 1 ⊢ (𝐴 ∈ dom vol → (vol‘𝐴) = (vol*‘𝐴)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2145 dom cdm 5651 ↾ cres 5653 ‘cfv 6538 vol*covol 25783 volcvol 25784 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2733 ax-sep 5249 ax-pr 5391 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2740 df-cleq 2753 df-clel 2836 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-xp 5657 df-rel 5658 df-cnv 5659 df-dm 5661 df-rn 5662 df-res 5663 df-iota 6494 df-fv 6546 df-vol 25786 |
| This theorem is used by: volss 25854 volun 25866 volinun 25867 volfiniun 25868 voliunlem3 25873 volsup 25877 iccvolcl 25888 ovolioo 25889 volioo 25890 ioovolcl 25891 uniioovol 25900 uniioombllem4 25907 volcn 25927 volivth 25928 vitalilem4 25932 i1fima2 26000 i1fd 26002 i1f0rn 26003 itg1val2 26005 itg1ge0 26007 itg11 26012 i1fadd 26016 i1fmul 26017 itg1addlem2 26018 itg1addlem4 26020 i1fres 26026 itg10a 26031 itg1ge0a 26032 itg1climres 26035 mbfi1fseqlem4 26039 itg2const2 26062 itg2gt0 26081 itg2cnlem2 26083 ftc1a 26357 ftc1lem4 26359 itgulm 26735 areaf 27289 cntnevol 34861 volmeas 34864 mblfinlem3 38577 mblfinlem4 38578 ismblfin 38579 voliunnfl 38582 volsupnfl 38583 itg2addnclem 38589 itg2addnclem2 38590 itg2gt0cn 38593 ftc1cnnclem 38609 ftc1anclem7 38617 areacirc 38631 arearect 44216 areaquad 44217 vol0 46968 volge0 46970 volsn 46976 volicc 47007 vonvol 47671 |
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