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Mirrors > Home > ILE Home > Th. List > df-topgen | Unicode version |
Description: Define a function that converts a basis to its corresponding topology. Equivalent to the definition of a topology generated by a basis in [Munkres] p. 78. (Contributed by NM, 16-Jul-2006.) |
Ref | Expression |
---|---|
df-topgen |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ctg 12124 | . 2 | |
2 | vx | . . 3 | |
3 | cvv 2681 | . . 3 | |
4 | vy | . . . . . 6 | |
5 | 4 | cv 1330 | . . . . 5 |
6 | 2 | cv 1330 | . . . . . . 7 |
7 | 5 | cpw 3505 | . . . . . . 7 |
8 | 6, 7 | cin 3065 | . . . . . 6 |
9 | 8 | cuni 3731 | . . . . 5 |
10 | 5, 9 | wss 3066 | . . . 4 |
11 | 10, 4 | cab 2123 | . . 3 |
12 | 2, 3, 11 | cmpt 3984 | . 2 |
13 | 1, 12 | wceq 1331 | 1 |
Colors of variables: wff set class |
This definition is referenced by: tgval 12207 eltg4i 12213 eltg3 12215 tg1 12217 tg2 12218 tgclb 12223 |
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