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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 25495 | . . 3 ⊢ vol = (vol* ↾ dom vol) | |
| 2 | 1 | fveq1i 6841 | . 2 ⊢ (vol‘𝐴) = ((vol* ↾ dom vol)‘𝐴) |
| 3 | fvres 6859 | . 2 ⊢ (𝐴 ∈ dom vol → ((vol* ↾ dom vol)‘𝐴) = (vol*‘𝐴)) | |
| 4 | 2, 3 | eqtrid 2783 | 1 ⊢ (𝐴 ∈ dom vol → (vol‘𝐴) = (vol*‘𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1542 ∈ wcel 2114 dom cdm 5631 ↾ cres 5633 ‘cfv 6498 vol*covol 25429 volcvol 25430 |
| 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 2708 ax-sep 5231 ax-pr 5375 |
| 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 2715 df-cleq 2728 df-clel 2811 df-ral 3052 df-rex 3062 df-rab 3390 df-v 3431 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-br 5086 df-opab 5148 df-xp 5637 df-rel 5638 df-cnv 5639 df-dm 5641 df-rn 5642 df-res 5643 df-iota 6454 df-fv 6506 df-vol 25432 |
| This theorem is referenced by: volss 25500 volun 25512 volinun 25513 volfiniun 25514 voliunlem3 25519 volsup 25523 iccvolcl 25534 ovolioo 25535 volioo 25536 ioovolcl 25537 uniioovol 25546 uniioombllem4 25553 volcn 25573 volivth 25574 vitalilem4 25578 i1fima2 25646 i1fd 25648 i1f0rn 25649 itg1val2 25651 itg1ge0 25653 itg11 25658 i1fadd 25662 i1fmul 25663 itg1addlem2 25664 itg1addlem4 25666 i1fres 25672 itg10a 25677 itg1ge0a 25678 itg1climres 25681 mbfi1fseqlem4 25685 itg2const2 25708 itg2gt0 25727 itg2cnlem2 25729 ftc1a 26004 ftc1lem4 26006 itgulm 26373 areaf 26925 cntnevol 34372 volmeas 34375 mblfinlem3 37980 mblfinlem4 37981 ismblfin 37982 voliunnfl 37985 volsupnfl 37986 itg2addnclem 37992 itg2addnclem2 37993 itg2gt0cn 37996 ftc1cnnclem 38012 ftc1anclem7 38020 areacirc 38034 arearect 43643 areaquad 43644 vol0 46387 volge0 46389 volsn 46395 volicc 46426 vonvol 47090 |
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