[SciPy-user] howto construct matrix A: dot(A.T, A) is positive-definite

Robert Kern robert.kern@gmail....
Fri Oct 5 11:38:28 CDT 2007

Dominique Orban wrote:

> I believe dot(X,Y) means X^T Y, so that dot(A.T, A) is in fact AA=A^2.

No, this is not correct. dot() is simply matrix multiplication.

Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco

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