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:Okay, I see that one would need to require the real dimension to be > 2, since otherwise a rotation in the plane has no non-trivial invariant subspace. Which is like in the complex case, where the complex dimension is required to be > 1. But other than that?[[User:Daqu|Daqu]] ([[User talk:Daqu|talk]]) 18:02, 20 June 2008 (UTC)
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== after having seen ==
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