Top network posts

• 12 Proving that $\mathbb R^3$ cannot be made into a real division algebra (and that extending complex multiplication would not work)
• 8 Is $O(2)$ really not isomorphic to $SO(2)\times \{-1,1\}$?
• 7 On the importance of order for bases in finite dimensional vector spaces
• 5 Need help determining the pairs of quaternions that anticommute
• 5 One more question about mapping quaternionic matrices into real matrices
• 5 Need help with proof of $SO(3)$ is path connected
• 5 Is a Lie algebra a complex or a real vector space?
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