Description: Topology of an opposite group. (Contributed by Mario Carneiro, 17-Sep-2015)
Ref | Expression | ||
---|---|---|---|
Hypotheses | oppgbas.1 | |
|
oppgtopn.2 | |
||
Assertion | oppgtopn | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | oppgbas.1 | |
|
2 | oppgtopn.2 | |
|
3 | eqid | |
|
4 | eqid | |
|
5 | 3 4 | topnval | |
6 | 1 3 | oppgbas | |
7 | 1 4 | oppgtset | |
8 | 6 7 | topnval | |
9 | 2 5 8 | 3eqtr2i | |