most recent 30 from http://mathoverflow.net 2013-06-19T07:30:26Z http://mathoverflow.net/feeds/user/4820 http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://mathoverflow.net/questions/19100/product-of-positive-matrices Aaron 2010-03-23T09:01:31Z 2010-03-23T10:50:44Z

<p>Is the product of non-negative definite matrices also non-negative definite? If not, let A and B be non-negative definite matrices, is '$tr(A^T B) >=0$' ?</p>