Hurewicz theorem says that for a simply connected space $X$, $\pi_2(X)\cong H_2(X,\mathbb Z)$. So $\pi_2(K3)\cong H_2(K3,\mathbb Z)\cong \mathbb Z^{20}$Z^{22}$. Here is a link:
|
2 | added 23 characters in body; edited body | ||
|
|
||||
|
|
1 |
|
||
|
Hurewicz theorem says that for a simply connected space $X$, $\pi_2(X)\cong H_2(X,\mathbb Z)$. So $\pi_2(K3)\cong \mathbb Z^{20}$. Here is a link: |
||||
