Which properties of matrices are we supposed to know for the exam? By that I mean for example in mock 2014 we need to know that XtWX is invertible since W is positive definite and X is full rank. But which principle is used to make this deduction? hat are some other key properties we should remember?
invertibility and other matrix property
Hi,
Which properties of matrices are we supposed to know for the exam? By that I mean for example in mock 2014 we need to know that XtWX is invertible since W is positive definite and X is full rank. But which principle is used to make this deduction? hat are some other key properties we should remember?
thank you
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