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Martin Wanvik
Trondheim, Norway
Age: 30
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21
If $A^2 = I$ (Identity Matrix) then $A = \pm I$
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7
Being isomorphic as representations of a group G
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6
How does $\exp(x+y) = \exp(x)\exp(y)$ imply $\exp(x) = [\exp(1)]^x$?
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5
How to analyze (sum and convergence) step-by-step this series: $\sum_{n=1}^\infty\frac{4}{(n+1)(n+2)}$?
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5
Prove: $\frac{2}{3\pi} \leq \int_{2\pi}^{3\pi}\frac{\sin x}{x}\;dx \leq \frac{1}{\pi}$
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5
Fiber bundles with same total spaces, but different base spaces
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5
Example of a functor which preserves all small limits but has no left adjoint
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