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May 6, 2012 at 21:17 comment added Natalie @Derek, you are absolutely right, $W$ is a subspace of $U_i^{\perp} - sorry for that.
May 6, 2012 at 21:04 history edited Natalie CC BY-SA 3.0
$W$ is a subspace of $U_i^{\perp}$, not of $U_i$.
May 4, 2012 at 22:19 comment added Derek Holt I am confused. First you say that $W$ intersects trivially with $U_i$, then you talk about $W$ being a subspace of $U_i$!
May 4, 2012 at 20:35 history asked Natalie CC BY-SA 3.0