417 reputation
29
bio website
location Bonn, Germany
age 30
visits member for 4 years, 4 months
seen yesterday

Dec
9
awarded  Caucus
Oct
29
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.
Jul
22
awarded  Yearling
Jul
21
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
Jul
21
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
Jul
21
answered Prove or disprove: if a set of 2d-points have symmetry axises, then at least one of the axises is eigenvector
Jul
2
awarded  Curious
Jun
3
accepted Number of surjections with injective restrictions
Jun
2
revised Number of surjections with injective restrictions
added 223 characters in body
Jun
2
comment Number of surjections with injective restrictions
@Bananarama: NO I think it is correct. Hopefully my edits will make this clear.
Jun
2
asked Number of surjections with injective restrictions
Feb
21
accepted Accumulation points of uncountable sets
Feb
21
revised Accumulation points of uncountable sets
edited body
Feb
21
asked Accumulation points of uncountable sets
Nov
27
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.
Nov
23
comment A game played on a rectangle
So the 2 by $n$ case might be the next interesting thing to look at...
Nov
23
accepted A game played on a rectangle
Nov
22
awarded  Nice Question
Nov
22
awarded  Yearling
Nov
22
revised A game played on a rectangle
typo