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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 25513 | . . 3 ⊢ vol = (vol* ↾ dom vol) | |
| 2 | 1 | fveq1i 6828 | . 2 ⊢ (vol‘𝐴) = ((vol* ↾ dom vol)‘𝐴) |
| 3 | fvres 6846 | . 2 ⊢ (𝐴 ∈ dom vol → ((vol* ↾ dom vol)‘𝐴) = (vol*‘𝐴)) | |
| 4 | 2, 3 | eqtrid 2786 | 1 ⊢ (𝐴 ∈ dom vol → (vol‘𝐴) = (vol*‘𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1547 ∈ wcel 2119 dom cdm 5618 ↾ cres 5620 ‘cfv 6485 vol*covol 25447 volcvol 25448 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-ext 2711 ax-sep 5218 ax-pr 5362 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-sb 2074 df-clab 2718 df-cleq 2731 df-clel 2814 df-ral 3054 df-rex 3064 df-rab 3392 df-v 3433 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4262 df-if 4455 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4839 df-br 5073 df-opab 5135 df-xp 5624 df-rel 5625 df-cnv 5626 df-dm 5628 df-rn 5629 df-res 5630 df-iota 6441 df-fv 6493 df-vol 25450 |
| This theorem is referenced by: volss 25518 volun 25530 volinun 25531 volfiniun 25532 voliunlem3 25537 volsup 25541 iccvolcl 25552 ovolioo 25553 volioo 25554 ioovolcl 25555 uniioovol 25564 uniioombllem4 25571 volcn 25591 volivth 25592 vitalilem4 25596 i1fima2 25664 i1fd 25666 i1f0rn 25667 itg1val2 25669 itg1ge0 25671 itg11 25676 i1fadd 25680 i1fmul 25681 itg1addlem2 25682 itg1addlem4 25684 i1fres 25690 itg10a 25695 itg1ge0a 25696 itg1climres 25699 mbfi1fseqlem4 25703 itg2const2 25726 itg2gt0 25745 itg2cnlem2 25747 ftc1a 26022 ftc1lem4 26024 itgulm 26391 areaf 26943 cntnevol 34412 volmeas 34415 mblfinlem3 38026 mblfinlem4 38027 ismblfin 38028 voliunnfl 38031 volsupnfl 38032 itg2addnclem 38038 itg2addnclem2 38039 itg2gt0cn 38042 ftc1cnnclem 38058 ftc1anclem7 38066 areacirc 38080 arearect 43660 areaquad 43661 vol0 46402 volge0 46404 volsn 46410 volicc 46441 vonvol 47105 |
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