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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 25656 | . . 3 ⊢ vol = (vol* ↾ dom vol) | |
| 2 | 1 | fveq1i 6883 | . 2 ⊢ (vol‘𝐴) = ((vol* ↾ dom vol)‘𝐴) |
| 3 | fvres 6901 | . 2 ⊢ (𝐴 ∈ dom vol → ((vol* ↾ dom vol)‘𝐴) = (vol*‘𝐴)) | |
| 4 | 2, 3 | eqtrid 2816 | 1 ⊢ (𝐴 ∈ dom vol → (vol‘𝐴) = (vol*‘𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1567 ∈ wcel 2149 dom cdm 5662 ↾ cres 5664 ‘cfv 6537 vol*covol 25590 volcvol 25591 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-ext 2741 ax-sep 5261 ax-pr 5405 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-sb 2098 df-clab 2748 df-cleq 2761 df-clel 2844 df-ral 3086 df-rex 3096 df-rab 3424 df-v 3465 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4493 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-br 5114 df-opab 5178 df-xp 5668 df-rel 5669 df-cnv 5670 df-dm 5672 df-rn 5673 df-res 5674 df-iota 6493 df-fv 6545 df-vol 25593 |
| This theorem is referenced by: volss 25661 volun 25673 volinun 25674 volfiniun 25675 voliunlem3 25680 volsup 25684 iccvolcl 25695 ovolioo 25696 volioo 25697 ioovolcl 25698 uniioovol 25707 uniioombllem4 25714 volcn 25734 volivth 25735 vitalilem4 25739 i1fima2 25807 i1fd 25809 i1f0rn 25810 itg1val2 25812 itg1ge0 25814 itg11 25819 i1fadd 25823 i1fmul 25824 itg1addlem2 25825 itg1addlem4 25827 i1fres 25833 itg10a 25838 itg1ge0a 25839 itg1climres 25842 mbfi1fseqlem4 25846 itg2const2 25869 itg2gt0 25888 itg2cnlem2 25890 ftc1a 26165 ftc1lem4 26167 itgulm 26537 areaf 27092 cntnevol 34563 volmeas 34566 mblfinlem3 38198 mblfinlem4 38199 ismblfin 38200 voliunnfl 38203 volsupnfl 38204 itg2addnclem 38210 itg2addnclem2 38211 itg2gt0cn 38214 ftc1cnnclem 38230 ftc1anclem7 38238 areacirc 38252 arearect 43834 areaquad 43835 vol0 46565 volge0 46567 volsn 46573 volicc 46604 vonvol 47268 |
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