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when toggle format what by license comment
Jan 25, 2015 at 14:24 comment added Ludwig Ok, thank you! How about if we assume that $\alpha_i\neq 0$, $\beta_i\neq 0$, $\gamma_i\neq 0$ for all $i$?
Jan 25, 2015 at 2:21 history answered Tadashi CC BY-SA 3.0