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Ragnar
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Mathematics and physics bachelor student at Utrecht University.

I participated in the 2011 (honourable mention) and 2013 (bronze) IMO. Got 3rd place (Gold medal) at the 2015 NWERC, which qualified me and my team Curiously Recurring for the 2016 ACM-ICPC world finals.

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question
5
TikZ node label alignment
Oct 9, 2015
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16
How to solve $y = \sqrt{k\sqrt{k\sqrt{k \sqrt{k\sqrt{\dots}}}}}$?
11
Clang modifies return value in destructor?
9
How can I show that $\left|\sum_{n=1}^\infty\frac{x}{n^2+x^2}\right|\leq\frac{\pi}{2}$ for any $x\in{\bf R}$?
9
Consider the trace map $M_n (\mathbb{R}) \to \mathbb{R}$. What is its kernel?
9
If $f(x)$ is discontinuous at $x=0$, can $\int_{-1}^1 f(x)dx$ exist.

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