Proof about orthogonal complements

borkborkmath

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Mar 4, 2011
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16
Given that U is a subspace of an inner product space V;

1) Show that if U^perp = V, then U = {0} (zero vector)
2) Show that if U^perp = {0}, then U = V


For 1, I thought that this would be seen because the zero vector is the only vector that is orthogonal to everything. But, I don't think that is correct.
 
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