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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 25508 | . . 3 ⊢ vol = (vol* ↾ dom vol) | |
| 2 | 1 | fveq1i 6836 | . 2 ⊢ (vol‘𝐴) = ((vol* ↾ dom vol)‘𝐴) |
| 3 | fvres 6854 | . 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 5625 ↾ cres 5627 ‘cfv 6493 vol*covol 25442 volcvol 25443 |
| 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 5232 ax-pr 5371 |
| 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 3391 df-v 3432 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-xp 5631 df-rel 5632 df-cnv 5633 df-dm 5635 df-rn 5636 df-res 5637 df-iota 6449 df-fv 6501 df-vol 25445 |
| This theorem is referenced by: volss 25513 volun 25525 volinun 25526 volfiniun 25527 voliunlem3 25532 volsup 25536 iccvolcl 25547 ovolioo 25548 volioo 25549 ioovolcl 25550 uniioovol 25559 uniioombllem4 25566 volcn 25586 volivth 25587 vitalilem4 25591 i1fima2 25659 i1fd 25661 i1f0rn 25662 itg1val2 25664 itg1ge0 25666 itg11 25671 i1fadd 25675 i1fmul 25676 itg1addlem2 25677 itg1addlem4 25679 i1fres 25685 itg10a 25690 itg1ge0a 25691 itg1climres 25694 mbfi1fseqlem4 25698 itg2const2 25721 itg2gt0 25740 itg2cnlem2 25742 ftc1a 26017 ftc1lem4 26019 itgulm 26389 areaf 26941 cntnevol 34391 volmeas 34394 mblfinlem3 37997 mblfinlem4 37998 ismblfin 37999 voliunnfl 38002 volsupnfl 38003 itg2addnclem 38009 itg2addnclem2 38010 itg2gt0cn 38013 ftc1cnnclem 38029 ftc1anclem7 38037 areacirc 38051 arearect 43664 areaquad 43665 vol0 46408 volge0 46410 volsn 46416 volicc 46447 vonvol 47111 |
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