I have no idea on where to begin. Also, I have to prove that the aforementioned set is convex, which I tried by contradicting, and I'm having difficulty with that as well. Any help would be appreciated!
2026-03-25 19:06:58.1774465618
How do I prove that group $B(v) = \{x : \|x\| \leq 1\}$ contains an ellipsoid around the axes?
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