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Oct 3, 2012 at 3:28 vote accept Henry Yuen
Mar 25, 2011 at 18:22 comment added Bill Johnson I missed that, but it doesn't matter much. Let one vector be $e_1$ and the other the normalization of $e_1$ plus a small multiple of $\sum_{k=2}^n e_k$.
Mar 25, 2011 at 18:15 comment added Henry Yuen I have specified that $\psi$ and $\phi$ are unit vectors in the 2 norm, however.
Mar 25, 2011 at 17:54 history answered Bill Johnson CC BY-SA 2.5