2 ms·
I'm not a topological expert, but I'm pretty sure you can have a surface without an interior. A unit sphere would be a good example of a surface without an inte
by kelseyfrog 2y ago
I'm not a topological expert, but I'm pretty sure you can have a surface without an interior. A unit sphere would be a good example of a surface without an interior.
- bongodongobob 2y ago? It by definition has a radius of 1.
- krukah 2y agounit sphere != unit ball The former is the boundary, the latter is the interior + boundary. One of the great arbitrary naming conventions of math.
- magicalhippo 2y agoMinor nitpick, the ball might be closed or open, depending on whether the boundary is included or not, respectively.