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Apparently, this user prefers to keep an air of mystery about them.

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14 Sum of squares of products of subsets without neighboring elements equals $(N+1)! -1$ Dec 25 '19
6 Is it possible for sum of three sequences $x_n + y_n+z_n$ to equal $0$? Jan 4
6 positive integer solutions to $x^3+y^3=3^z$ Sep 9 '18
6 A bug's journey Jul 26 '18
6 Is $\sqrt{3-\sqrt{3}} \in L = \mathbb{Q}(\sqrt{3+\sqrt{3}})$? Oct 15 '19
5 Partition the integers into three subsets such that for any $n$, the three integers $n, n+p$ and $n+q$ belong to different subsets Jul 3 '19
4 Flea on infinite chessboard jumping with irrational vector eventually changes square color May 11 '19
4 $\{ x \in X : |f(x)| \geq \epsilon \}$ is compact then $f$ is uniformly continuous on $X$. Nov 20 '18
4 Is it true that $A^TA=A \implies A^2=A$? Is the converse true? Mar 9 '19
3 $a^2−ab+b^2=c^2$. Show prime factors of $c$ are of the form $6k + 1$ Jul 18 '18
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