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Closestsolutiontoagivenpoint. Suppose the wide matrix A has linearly independent rows. Find an expression for the point x that is closest to a given vector y

Closestsolutiontoagivenpoint. Suppose the wide matrix A has linearly independent rows. Find an expression for the point x that is closest to a given vector y (i.e., minimizes xy2) among all vectors that satisfy Ax=b.

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