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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 25861 | . . 3 ⊢ vol = (vol* ↾ dom vol) | |
| 2 | 1 | fveq1i 6894 | . 2 ⊢ (vol‘𝐴) = ((vol* ↾ dom vol)‘𝐴) |
| 3 | fvres 6912 | . 2 ⊢ (𝐴 ∈ dom vol → ((vol* ↾ dom vol)‘𝐴) = (vol*‘𝐴)) | |
| 4 | 2, 3 | eqtrid 2810 | 1 ⊢ (𝐴 ∈ dom vol → (vol‘𝐴) = (vol*‘𝐴)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1569 ∈ wcel 2146 dom cdm 5654 ↾ cres 5656 ‘cfv 6546 vol*covol 25795 volcvol 25796 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-ext 2735 ax-sep 5251 ax-pr 5394 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-sb 2101 df-clab 2742 df-cleq 2755 df-clel 2838 df-ral 3080 df-rex 3090 df-rab 3416 df-v 3455 df-ss 3900 df-dif 4049 df-in 4093 df-un 4153 df-nul 4281 df-if 4485 df-sn 4588 df-pr 4590 df-op 4838 df-uni 4870 df-br 5106 df-opab 5170 df-xp 5660 df-rel 5661 df-cnv 5662 df-dm 5664 df-rn 5665 df-res 5666 df-iota 6500 df-fv 6554 df-vol 25798 |
| This theorem is used by: volss 25866 volun 25878 volinun 25879 volfiniun 25880 voliunlem3 25885 volsup 25889 iccvolcl 25900 ovolioo 25901 volioo 25902 ioovolcl 25903 uniioovol 25912 uniioombllem4 25919 volcn 25939 volivth 25940 vitalilem4 25944 i1fima2 26012 i1fd 26014 i1f0rn 26015 itg1val2 26017 itg1ge0 26019 itg11 26024 i1fadd 26028 i1fmul 26029 itg1addlem2 26030 itg1addlem4 26032 i1fres 26038 itg10a 26043 itg1ge0a 26044 itg1climres 26047 mbfi1fseqlem4 26051 itg2const2 26074 itg2gt0 26093 itg2cnlem2 26095 ftc1a 26369 ftc1lem4 26371 itgulm 26747 areaf 27301 cntnevol 34914 volmeas 34917 mblfinlem3 38717 mblfinlem4 38718 ismblfin 38719 voliunnfl 38722 volsupnfl 38723 itg2addnclem 38729 itg2addnclem2 38730 itg2gt0cn 38733 ftc1cnnclem 38749 ftc1anclem7 38757 areacirc 38771 arearect 44357 areaquad 44358 vol0 47108 volge0 47110 volsn 47116 volicc 47147 vonvol 47811 |
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