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Learning
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I am an alien who came on Earth to learn Mathematics. :)

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16
When will a group be Abelian?
10
Find $\lim_{x\to \infty} \left[f\!\left(\sqrt{\frac{2}{x}}\,\right)\right]^x$.
9
The number of subgroups of index two in $G$
7
Integral of rational function - which contour to use?
6
Find the rank of $T^2$