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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 25483 | . . 3 ⊢ vol = (vol* ↾ dom vol) | |
| 2 | 1 | fveq1i 6833 | . 2 ⊢ (vol‘𝐴) = ((vol* ↾ dom vol)‘𝐴) |
| 3 | fvres 6851 | . 2 ⊢ (𝐴 ∈ dom vol → ((vol* ↾ dom vol)‘𝐴) = (vol*‘𝐴)) | |
| 4 | 2, 3 | eqtrid 2781 | 1 ⊢ (𝐴 ∈ dom vol → (vol‘𝐴) = (vol*‘𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1541 ∈ wcel 2113 dom cdm 5622 ↾ cres 5624 ‘cfv 6490 vol*covol 25417 volcvol 25418 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2706 ax-sep 5239 ax-nul 5249 ax-pr 5375 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2713 df-cleq 2726 df-clel 2809 df-ral 3050 df-rex 3059 df-rab 3398 df-v 3440 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4284 df-if 4478 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-br 5097 df-opab 5159 df-xp 5628 df-rel 5629 df-cnv 5630 df-dm 5632 df-rn 5633 df-res 5634 df-iota 6446 df-fv 6498 df-vol 25420 |
| This theorem is referenced by: volss 25488 volun 25500 volinun 25501 volfiniun 25502 voliunlem3 25507 volsup 25511 iccvolcl 25522 ovolioo 25523 volioo 25524 ioovolcl 25525 uniioovol 25534 uniioombllem4 25541 volcn 25561 volivth 25562 vitalilem4 25566 i1fima2 25634 i1fd 25636 i1f0rn 25637 itg1val2 25639 itg1ge0 25641 itg11 25646 i1fadd 25650 i1fmul 25651 itg1addlem2 25652 itg1addlem4 25654 i1fres 25660 itg10a 25665 itg1ge0a 25666 itg1climres 25669 mbfi1fseqlem4 25673 itg2const2 25696 itg2gt0 25715 itg2cnlem2 25717 ftc1a 25998 ftc1lem4 26000 itgulm 26371 areaf 26925 cntnevol 34334 volmeas 34337 mblfinlem3 37799 mblfinlem4 37800 ismblfin 37801 voliunnfl 37804 volsupnfl 37805 itg2addnclem 37811 itg2addnclem2 37812 itg2gt0cn 37815 ftc1cnnclem 37831 ftc1anclem7 37839 areacirc 37853 arearect 43399 areaquad 43400 vol0 46145 volge0 46147 volsn 46153 volicc 46184 vonvol 46848 |
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