An Application of Linear Algebra |

Kevin McGoldrick - Math 345, Fall 2009 |

Least Squares Estimation More Linear Algebra |

Theorem 2: Suppose A is an n x m matrix with linearly independent columns. Then A
Proof: It suffices to show that A Ax = x
As the columns of A are linearly independent, we must have x = 0. Thus, A |

Matrix A |

Matrix A |

Then, A |