Stable homotopy group
= Stable homotopy group
{title2=$\pi_kE$}
The $k$th <stable homotopy group> of $E$ is $\pi_kE=[\Sigma^k\mathbb S,E]_{\mathrm{st}}$, equivalently $\operatorname{colim}_j\pi_{k+j}E_j$ in a sequential model.
= Stable homotopy group
{title2=$\pi_kE$}
The $k$th <stable homotopy group> of $E$ is $\pi_kE=[\Sigma^k\mathbb S,E]_{\mathrm{st}}$, equivalently $\operatorname{colim}_j\pi_{k+j}E_j$ in a sequential model.