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Feb 9, 2015 at 23:38 vote accept joaopa
Feb 9, 2015 at 19:00 answer added Will Sawin timeline score: 2
Feb 9, 2015 at 17:29 comment added KConrad You left out the condition $\alpha_1 \not= 0$.
Feb 9, 2015 at 17:17 history asked joaopa CC BY-SA 3.0