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Apr 13, 2017 at 12:40 history edited CommunityBot
replaced http://physics.stackexchange.com/ with https://physics.stackexchange.com/
Mar 10, 2017 at 9:42 history edited CommunityBot
replaced http://upload.wikimedia.org/ with https://upload.wikimedia.org/
Feb 10, 2014 at 2:43 comment added Selene Routley What a great answer and what an elegant little theorem (Schur-Horn)- I'd never heard of that one, thanks!
Nov 17, 2013 at 15:00 history edited Qmechanic CC BY-SA 3.0
added explanation
Nov 16, 2013 at 22:40 comment added hhh Great! +1 some references to read further?
Nov 16, 2013 at 22:34 history answered Qmechanic CC BY-SA 3.0