$[v_4,l_4]=$?, where $v_4$ is the Hopf map in $\pi_7(S^4)$ and $l_4$ is the generator of $\pi_4(S^4)$ which represent the identity map, $[,]$ is whitehead product.
[v_4,l_4]=?, v_4 is the Hopf map in \pi_7(S^4) and l_4 is the generator of \pi_4(S^4)
user21719
- 53
- 4