HenrikRueping
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 Jan28 awarded Popular Question Dec9 awarded Caucus Oct29 comment What happens if you follow the sun? Usually Iwould also expect that you would go a little bit west every day. In the morning, you go east towards the sun and thus reach the point where the sun is directly above you some seconds before Mid-day. Then for the rest of the day you would go east. So every day you got a bit more to the west then to the east. Jul22 awarded Yearling Jul21 revised Prove or disprove: if a set of 2d-points have symmetry axises, then at least one of the axises is eigenvector added 199 characters in body Jul21 revised Prove or disprove: if a set of 2d-points have symmetry axises, then at least one of the axises is eigenvector added 372 characters in body Jul21 answered Prove or disprove: if a set of 2d-points have symmetry axises, then at least one of the axises is eigenvector Jul2 awarded Curious Jun3 accepted Number of surjections with injective restrictions Jun2 revised Number of surjections with injective restrictions added 223 characters in body Jun2 comment Number of surjections with injective restrictions @Bananarama: NO I think it is correct. Hopefully my edits will make this clear. Jun2 asked Number of surjections with injective restrictions Feb21 accepted Accumulation points of uncountable sets Feb21 revised Accumulation points of uncountable sets edited body Feb21 asked Accumulation points of uncountable sets Nov27 comment geodesic submanifolds Given any nonempty, complete geodesic submanifold $M$ of $n$-dimensional hyperbolic space. Pick a point $x\in M$ and consider the subspace $T_xM\subset T_\mathbb{H}^n$. Now you could show that $M=exp(T_xM)$ since $M$ is complete. Thus $M$ is uniquely determined by that vectorspace. Given any subspace $V\subset T_x\mathbb{H}^n$ at some point $x$ try to find (among the submanifolds that you mentioned) one with $T_xM=V$. This shows that these are really all geodesic (complete) submanifolds. Nov23 comment A game played on a rectangle So the 2 by $n$ case might be the next interesting thing to look at... Nov23 accepted A game played on a rectangle Nov22 awarded Nice Question Nov22 awarded Yearling