3 ms·
> The first homology group of the didicosm is ℤ4 × ℤ4. What about the other 5 "orientable platycosms"? I assume 3-Torus is another with ℤ × ℤ × ℤ (?)
by bryan0 3y ago
> The first homology group of the didicosm is ℤ4 × ℤ4.
What about the other 5 "orientable platycosms"? I assume 3-Torus is another with ℤ × ℤ × ℤ (?)