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Jan
21
awarded  Yearling
Jan
6
asked The hardest game of mahjongg
Jan
3
answered Image of an open set has measure zero under a smooth map
Dec
16
revised symetrical coordinates of algebraic variety
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Dec
15
asked symetrical coordinates of algebraic variety
Nov
27
comment Hill climbing extremist
Walner, Any progress? Do you have an example for me which shows that it is not possible?
Nov
19
comment Hill climbing extremist
Imagine single hill. In order to get from point A to point B, you go straight uphill and you get on the top of this hill then you go downhill in the direction you would come from if you started in the point B, in this way you get to point B. Such a path is not an integral curve of that vector field.
Nov
19
comment Hill climbing extremist
Sorry but I can't figure out your idea. Please give me a counterexample which satisfies my conditions, than I will be happy, but now I do not find your answer helpful. I believe that you still misunderstand my question, have in mind following simple example:
Nov
18
comment Hill climbing extremist
And important thing is that I'm not looking for integral curves of some vector field, because you cannot get into point, where the field is zero, in finite time(vector field has to be lipschitz). But in my question such a points play very important role.
Nov
18
comment Hill climbing extremist
Sorry I had to down vote. Your answer is not helpfull in any way. Your 'counter example' is the exact reason why $\phi$ has to be zero at infinity. The variational formulation does not make any sense. Constant paths minimizies the integral or paths that are perpendicular to the $\nabla \phi$. I'm not interested in such paths.
Nov
17
awarded  Nice Question
Nov
17
answered Evaluate limit $\displaystyle\lim_{x\rightarrow\infty} (1+\sin{x})^{\frac{1}{x}}$
Nov
15
answered Does there exist a continuous $g(x,t)$ such that every continuous$ f(x)$ equals $g(x,t)$ for some $t$ and all $x$??
Nov
14
reviewed Approve The graph of $f$ is a connected subset of $\mathbb{R}^2$.
Nov
13
awarded  Mortarboard
Nov
13
awarded  Good Answer
Nov
13
asked Hill climbing extremist
Nov
12
reviewed Approve What software can draw pictures like this?
Nov
12
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Nov
12
answered What software can draw pictures like this?