Talk:String group

Dimension restriction

I think, this needs a dimension restriction of at least $n\geq 3$. Otherwise $Spin(n)$ is a point or circle implying that it does not have a third homotopy group to be killed. — Preceding unsigned comment added by 2A00:1398:9:FB03:DD1E:DEBC:DD79:8DD0 (talk) 14:16, 15 October 2019 (UTC)