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# 8,962 Reputation

65 yesterday
 +40 19:22 upvote Are there $a,b \in \mathbb{N}$ that ${(\sum_{k=1}^n k)}^a = \sum_{k=1}^n k^b$ beside $2,3$ +15 19:21 accept Are there $a,b \in \mathbb{N}$ that ${(\sum_{k=1}^n k)}^a = \sum_{k=1}^n k^b$ beside $2,3$ +10 18:30 upvote Is there a method that determines an unknown permutation better than $\sum_{k=1}^n (k+1)/2$ steps on average?
35 Jul 15
 +15 22:43 accept $\int_0^\infty \frac{\sin(x^2+ax)}{x}\,dx$ converges +20 21:06 upvote $\int_0^\infty \frac{\sin(x^2+ax)}{x}\,dx$ converges
20 Jul 13
 +20 13:51 upvote Why a tesselation of the plane by a convex polygon of 7 or more sides is not possible?
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