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Mirrors > Home > MPE Home > Th. List > df-mbf | Structured version Visualization version Unicode version |
Description: Define the class of measurable functions on the reals. A real function is measurable if the preimage of every open interval is a measurable set (see ismbl 23294) and a complex function is measurable if the real and imaginary parts of the function is measurable. (Contributed by Mario Carneiro, 17-Jun-2014.) |
Ref | Expression |
---|---|
df-mbf | MblFn |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cmbf 23383 | . 2 MblFn | |
2 | cre 13837 | . . . . . . . . 9 | |
3 | vf | . . . . . . . . . 10 | |
4 | 3 | cv 1482 | . . . . . . . . 9 |
5 | 2, 4 | ccom 5118 | . . . . . . . 8 |
6 | 5 | ccnv 5113 | . . . . . . 7 |
7 | vx | . . . . . . . 8 | |
8 | 7 | cv 1482 | . . . . . . 7 |
9 | 6, 8 | cima 5117 | . . . . . 6 |
10 | cvol 23232 | . . . . . . 7 | |
11 | 10 | cdm 5114 | . . . . . 6 |
12 | 9, 11 | wcel 1990 | . . . . 5 |
13 | cim 13838 | . . . . . . . . 9 | |
14 | 13, 4 | ccom 5118 | . . . . . . . 8 |
15 | 14 | ccnv 5113 | . . . . . . 7 |
16 | 15, 8 | cima 5117 | . . . . . 6 |
17 | 16, 11 | wcel 1990 | . . . . 5 |
18 | 12, 17 | wa 384 | . . . 4 |
19 | cioo 12175 | . . . . 5 | |
20 | 19 | crn 5115 | . . . 4 |
21 | 18, 7, 20 | wral 2912 | . . 3 |
22 | cc 9934 | . . . 4 | |
23 | cr 9935 | . . . 4 | |
24 | cpm 7858 | . . . 4 | |
25 | 22, 23, 24 | co 6650 | . . 3 |
26 | 21, 3, 25 | crab 2916 | . 2 |
27 | 1, 26 | wceq 1483 | 1 MblFn |
Colors of variables: wff setvar class |
This definition is referenced by: ismbf1 23393 |
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