Author: Urs Format: MarkdownItexsome trivia here, just for completeness, to go along with entries such as [[SO(2)]], [[Pin(2)]] etc. and for useful hyperlinking in particular from [[finite subgroups of SU(2)]]
<a href="https://ncatlab.org/nlab/revision/Spin%282%29/1">v1</a>, <a href="https://ncatlab.org/nlab/show/Spin%282%29">current</a>
some trivia here, just for completeness, to go along with entries such as SO(2), Pin(2) etc. and for useful hyperlinking in particular from finite subgroups of SU(2)