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