Description: Value of the topology extractor function when the topology is defined over the same set as the base. (Contributed by Mario Carneiro, 13-Aug-2015)
Ref | Expression | ||
---|---|---|---|
Hypotheses | topnval.1 | |
|
topnval.2 | |
||
Assertion | topnid | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | topnval.1 | |
|
2 | topnval.2 | |
|
3 | 1 | fvexi | |
4 | restid2 | |
|
5 | 3 4 | mpan | |
6 | 1 2 | topnval | |
7 | 5 6 | eqtr3di | |