Denote 2-dimensional torus by $T^2=S^1 \times S^1$ ,and unit disc by $ D^2$.Define $$
T^2\# T^2=T^2-D^2\cup_{S^1}T^2-D^2 $$
how to compute $H_n(T^2 \# T^2)$
Asked
Active
Viewed 108 times
0
Bruce
- 181
-
Did you try Mayer-Vietoris? – Pedro Jan 09 '18 at 13:16
-
could you help me show more details? – Bruce Jan 09 '18 at 13:17
-
See here. – Pedro Jan 09 '18 at 13:43