Description: The limit points of a subset are included in the base set. (Contributed by NM, 9-Nov-2007)
Ref | Expression | ||
---|---|---|---|
Hypothesis | lpfval.1 | |
|
Assertion | lpss | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | lpfval.1 | |
|
2 | 1 | lpsscls | |
3 | 1 | clsss3 | |
4 | 2 3 | sstrd | |