What I have learned as Hadamard's Inequality is that for positive-semi-
definite matrix
det(A)<=a_11a_22.....a_NN
where a_ii is the $i$th diagonal elements of A.
This is different from the definiation of Hadamard's Inequality in Wiki and
Mathworld. http://en.wikipedia.org/wiki/Hadamard's_inequality
And I cannot find the related matrials from google!!!!!!!!!!!!!!!!
What really is going on?
Thanks