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when toggle format what by license comment
Nov 24, 2013 at 14:34 vote accept CommunityBot
Nov 24, 2013 at 4:58 comment added Kevin Ventullo Also, the "states" on this group are all of the form $(a,b)\mapsto \lambda_1a+\lambda_2b$ where $\lambda_1,\lambda_2\geq 0$.
Nov 23, 2013 at 22:56 history answered Kevin Ventullo CC BY-SA 3.0