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 Jul 2 awarded Curious Jan 25 accepted positive solution of a system of linear equations Jan 24 asked positive solution of a system of linear equations Oct 19 comment minimal polynomial of power of algebraic number thanks. Somehow this question can be formulated as given $\alpha$, how to compute (symbolically) $\alpha^m$. I guess there must be some algorithm to do so. Oct 19 asked minimal polynomial of power of algebraic number Oct 5 awarded Scholar Oct 5 accepted Is this random walk well studied? Oct 5 accepted Convex combination Oct 4 awarded Supporter Oct 4 asked Convex combination Sep 14 asked bound the distance of two roots of multivariate polynomial systems Sep 11 comment zeros of linear recurence sequences thanks. I mean given a linear recurrence relation, e.g., $a_{n+m}= \sum_{i=1}^{m-1} c_ia_{n+i}$, and $c_i$ are all integers, and $a_1, \dots, a_{m-1}$ are given integers. Sep 11 asked zeros of linear recurence sequences May 30 comment local variance of Markov decision processes I saw once, but I simply forgot it; this is why I asked. May 30 asked local variance of Markov decision processes Apr 16 awarded Student Apr 16 asked Is this random walk well studied? Apr 16 comment a multivariate quadratic function Thanks. A might stupid question, I can see that $\nabla f(x) = 2Mx +L$, but how do you derive this? Apr 16 asked convex set, convex function