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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 25500 | . . 3 ⊢ vol = (vol* ↾ dom vol) | |
| 2 | 1 | fveq1i 6843 | . 2 ⊢ (vol‘𝐴) = ((vol* ↾ dom vol)‘𝐴) |
| 3 | fvres 6861 | . 2 ⊢ (𝐴 ∈ dom vol → ((vol* ↾ dom vol)‘𝐴) = (vol*‘𝐴)) | |
| 4 | 2, 3 | eqtrid 2784 | 1 ⊢ (𝐴 ∈ dom vol → (vol‘𝐴) = (vol*‘𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1542 ∈ wcel 2114 dom cdm 5632 ↾ cres 5634 ‘cfv 6500 vol*covol 25434 volcvol 25435 |
| 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 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2709 ax-sep 5243 ax-pr 5379 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-ral 3053 df-rex 3063 df-rab 3402 df-v 3444 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-xp 5638 df-rel 5639 df-cnv 5640 df-dm 5642 df-rn 5643 df-res 5644 df-iota 6456 df-fv 6508 df-vol 25437 |
| This theorem is referenced by: volss 25505 volun 25517 volinun 25518 volfiniun 25519 voliunlem3 25524 volsup 25528 iccvolcl 25539 ovolioo 25540 volioo 25541 ioovolcl 25542 uniioovol 25551 uniioombllem4 25558 volcn 25578 volivth 25579 vitalilem4 25583 i1fima2 25651 i1fd 25653 i1f0rn 25654 itg1val2 25656 itg1ge0 25658 itg11 25663 i1fadd 25667 i1fmul 25668 itg1addlem2 25669 itg1addlem4 25671 i1fres 25677 itg10a 25682 itg1ge0a 25683 itg1climres 25686 mbfi1fseqlem4 25690 itg2const2 25713 itg2gt0 25732 itg2cnlem2 25734 ftc1a 26015 ftc1lem4 26017 itgulm 26388 areaf 26942 cntnevol 34410 volmeas 34413 mblfinlem3 37914 mblfinlem4 37915 ismblfin 37916 voliunnfl 37919 volsupnfl 37920 itg2addnclem 37926 itg2addnclem2 37927 itg2gt0cn 37930 ftc1cnnclem 37946 ftc1anclem7 37954 areacirc 37968 arearect 43576 areaquad 43577 vol0 46321 volge0 46323 volsn 46329 volicc 46360 vonvol 47024 |
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