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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 25590 | . . 3 ⊢ vol = (vol* ↾ dom vol) | |
| 2 | 1 | fveq1i 6868 | . 2 ⊢ (vol‘𝐴) = ((vol* ↾ dom vol)‘𝐴) |
| 3 | fvres 6886 | . 2 ⊢ (𝐴 ∈ dom vol → ((vol* ↾ dom vol)‘𝐴) = (vol*‘𝐴)) | |
| 4 | 2, 3 | eqtrid 2809 | 1 ⊢ (𝐴 ∈ dom vol → (vol‘𝐴) = (vol*‘𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1560 ∈ wcel 2142 dom cdm 5647 ↾ cres 5649 ‘cfv 6521 vol*covol 25524 volcvol 25525 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1815 ax-4 1829 ax-5 1930 ax-6 1987 ax-7 2028 ax-8 2144 ax-9 2152 ax-ext 2734 ax-sep 5246 ax-pr 5390 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1100 df-tru 1563 df-fal 1573 df-ex 1800 df-sb 2091 df-clab 2741 df-cleq 2754 df-clel 2837 df-ral 3077 df-rex 3087 df-rab 3415 df-v 3456 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4481 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-xp 5653 df-rel 5654 df-cnv 5655 df-dm 5657 df-rn 5658 df-res 5659 df-iota 6477 df-fv 6529 df-vol 25527 |
| This theorem is referenced by: volss 25595 volun 25607 volinun 25608 volfiniun 25609 voliunlem3 25614 volsup 25618 iccvolcl 25629 ovolioo 25630 volioo 25631 ioovolcl 25632 uniioovol 25641 uniioombllem4 25648 volcn 25668 volivth 25669 vitalilem4 25673 i1fima2 25741 i1fd 25743 i1f0rn 25744 itg1val2 25746 itg1ge0 25748 itg11 25753 i1fadd 25757 i1fmul 25758 itg1addlem2 25759 itg1addlem4 25761 i1fres 25767 itg10a 25772 itg1ge0a 25773 itg1climres 25776 mbfi1fseqlem4 25780 itg2const2 25803 itg2gt0 25822 itg2cnlem2 25824 ftc1a 26099 ftc1lem4 26101 itgulm 26471 areaf 27026 cntnevol 34525 volmeas 34528 mblfinlem3 38158 mblfinlem4 38159 ismblfin 38160 voliunnfl 38163 volsupnfl 38164 itg2addnclem 38170 itg2addnclem2 38171 itg2gt0cn 38174 ftc1cnnclem 38190 ftc1anclem7 38198 areacirc 38212 arearect 43792 areaquad 43793 vol0 46533 volge0 46535 volsn 46541 volicc 46572 vonvol 47236 |
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