Hi, I'm giving a talk tomorrow morning, and I'd like to use the following fact: a path-connected subgroup of SO(3) consists of either a) only the identity, b) all the rotations about a single axis, or c) all of SO(3).(adsbygoogle = window.adsbygoogle || []).push({});

Unfortunately, I can't for the life of me find where I read it, and I'm not 100% sure I'm remembering it correctly. Can anyone provide a reference, a quick proof, or tell me it's wrong? Thanks!

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# Path connected subgroups of SO(3), please help

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