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April 19, 2014

Homework Help: MATHS----Matrix

Posted by Lisa on Wednesday, September 8, 2010 at 4:18am.

For a given square matrix A the predicted values of matrix B are:

predicted B=A(A'A)^(-1)A'B

why is the matrix C=A(A'A)^(-1)A' an idempotent and symmetric matrix? and is this matrix invertible?

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