Mathbox for Thierry Arnoux |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > df-ind | Structured version Visualization version Unicode version |
Description: Define the indicator function generator. (Contributed by Thierry Arnoux, 20-Jan-2017.) |
Ref | Expression |
---|---|
df-ind | 𝟭 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cind 30072 | . 2 𝟭 | |
2 | vo | . . 3 | |
3 | cvv 3200 | . . 3 | |
4 | va | . . . 4 | |
5 | 2 | cv 1482 | . . . . 5 |
6 | 5 | cpw 4158 | . . . 4 |
7 | vx | . . . . 5 | |
8 | 7, 4 | wel 1991 | . . . . . 6 |
9 | c1 9937 | . . . . . 6 | |
10 | cc0 9936 | . . . . . 6 | |
11 | 8, 9, 10 | cif 4086 | . . . . 5 |
12 | 7, 5, 11 | cmpt 4729 | . . . 4 |
13 | 4, 6, 12 | cmpt 4729 | . . 3 |
14 | 2, 3, 13 | cmpt 4729 | . 2 |
15 | 1, 14 | wceq 1483 | 1 𝟭 |
Colors of variables: wff setvar class |
This definition is referenced by: indv 30074 |
Copyright terms: Public domain | W3C validator |