Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > df-ntr | Unicode version |
Description: Define a function on topologies whose value is the interior function on the subsets of the base set. See ntrval 12289. (Contributed by NM, 10-Sep-2006.) |
Ref | Expression |
---|---|
df-ntr |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cnt 12272 | . 2 | |
2 | vj | . . 3 | |
3 | ctop 12174 | . . 3 | |
4 | vx | . . . 4 | |
5 | 2 | cv 1330 | . . . . . 6 |
6 | 5 | cuni 3736 | . . . . 5 |
7 | 6 | cpw 3510 | . . . 4 |
8 | 4 | cv 1330 | . . . . . . 7 |
9 | 8 | cpw 3510 | . . . . . 6 |
10 | 5, 9 | cin 3070 | . . . . 5 |
11 | 10 | cuni 3736 | . . . 4 |
12 | 4, 7, 11 | cmpt 3989 | . . 3 |
13 | 2, 3, 12 | cmpt 3989 | . 2 |
14 | 1, 13 | wceq 1331 | 1 |
Colors of variables: wff set class |
This definition is referenced by: ntrfval 12279 |
Copyright terms: Public domain | W3C validator |