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Question: inner product of nonnegative vectors a vector is called nonnegative...

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Inner product of nonnegative vectors. A vector is called nonnegative if all its entries are nonnegative. (a) Explain why the inner product of two nonnegative vectors is nonnegative. (b) Suppose the inner product of two nonnegative vectors is zero. What can you say about them? Your answer should be in terms of their respective sparsity patterns, i.e, which entries are zero and nonzero.

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