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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 23296 | . . 3 ⊢ vol = (vol* ↾ dom vol) | |
2 | 1 | fveq1i 6192 | . 2 ⊢ (vol‘𝐴) = ((vol* ↾ dom vol)‘𝐴) |
3 | fvres 6207 | . 2 ⊢ (𝐴 ∈ dom vol → ((vol* ↾ dom vol)‘𝐴) = (vol*‘𝐴)) | |
4 | 2, 3 | syl5eq 2668 | 1 ⊢ (𝐴 ∈ dom vol → (vol‘𝐴) = (vol*‘𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1483 ∈ wcel 1990 dom cdm 5114 ↾ cres 5116 ‘cfv 5888 vol*covol 23231 volcvol 23232 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pr 4906 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ral 2917 df-rex 2918 df-rab 2921 df-v 3202 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 df-sn 4178 df-pr 4180 df-op 4184 df-uni 4437 df-br 4654 df-opab 4713 df-xp 5120 df-rel 5121 df-cnv 5122 df-dm 5124 df-rn 5125 df-res 5126 df-iota 5851 df-fv 5896 df-vol 23234 |
This theorem is referenced by: volss 23301 volun 23313 volinun 23314 volfiniun 23315 voliunlem3 23320 volsup 23324 iccvolcl 23335 ovolioo 23336 volioo 23337 ioovolcl 23338 uniioovol 23347 uniioombllem4 23354 volcn 23374 volivth 23375 vitalilem4 23380 i1fima2 23446 i1fd 23448 i1f0rn 23449 itg1val2 23451 itg1ge0 23453 itg11 23458 i1fadd 23462 i1fmul 23463 itg1addlem2 23464 itg1addlem4 23466 i1fres 23472 itg10a 23477 itg1ge0a 23478 itg1climres 23481 mbfi1fseqlem4 23485 itg2const2 23508 itg2gt0 23527 itg2cnlem2 23529 ftc1a 23800 ftc1lem4 23802 itgulm 24162 areaf 24688 cntnevol 30291 volmeas 30294 mblfinlem3 33448 mblfinlem4 33449 ismblfin 33450 voliunnfl 33453 volsupnfl 33454 itg2addnclem 33461 itg2addnclem2 33462 itg2gt0cn 33465 ftc1cnnclem 33483 ftc1anclem7 33491 areacirc 33505 arearect 37801 areaquad 37802 vol0 40175 volge0 40177 volsn 40183 volicc 40215 vonvol 40876 |
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