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Frieder Jäckel's user avatar
Frieder Jäckel's user avatar
Frieder Jäckel's user avatar
Frieder Jäckel
  • Member for 2 years, 1 month
  • Last seen more than 1 year ago
  • Bonn, Germany
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I am a PhD student at the University of Bonn, where my advisor is Ursula Hamenstädt.

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Stallings' fibration theorem - Explicit description
Oct 31, 2022
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Effective Uniformization Theorem for the Torus
7
Prove that the product of sines of angles of a triangle is min if it is equilateral
6
Closed geodesic on a Riemannian manifold is homotopic to a closed curve of strictly shorter length
6
Simply connected compact Lie groups have even dimension - Where is the mistake?
6
Inequality : $ (a_1a_2+a_2a_3+\ldots+a_na_1)\left(\frac{a_1}{a^2_2+a_2}+\frac{a_2}{a^2_3+a_3}+ \ldots+\frac{a_n}{a^2_1+a_1}\right)\geq \frac{n}{n+1} $