<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">$$
\def\mod{\mathrel{\big/}}
\Dg
{\rm Spin}(3) &amp;        &amp;       &amp;       &amp; SU(2)       \\
              &amp; \rdTo  &amp;       &amp; \ldTo               \\
              &amp;        &amp; SO(3)                       \\
              &amp;        &amp; \dTo                        \\
&amp; O(3)\mod O(1)^3 = {} &amp; SO(3)\mod(O(1)^3\cap SO(3)) \\
\endDg
$$
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