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Mar 7, 2011 at 14:54 answer added Sergei Ivanov timeline score: 7
Mar 7, 2011 at 14:03 answer added David Bar Moshe timeline score: 4
Mar 7, 2011 at 3:42 comment added Deane Yang Also, doesn't it suffice to prove this when $A$ is diagonal?
Mar 7, 2011 at 0:29 comment added Deane Yang Does using Lagrange multipliers and looking for the critical points not work?
Mar 7, 2011 at 0:09 history asked David Epstein CC BY-SA 2.5