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How can I solve the for the geodesics of this modified version of the hyperbolic metric inside the closed punctured disc $$ \{ (x,y) \in \mathbb{R} : 0

$$ ds^2 = \frac{dx^2 + dy^2}{x^2+y^2} $$

I expect the solutions to be two types of geodesics - (Very small) arcs - movement towards the boundary around and back up (ish)...

How can I prove this?

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    This does not define a metric on the disk, because it blows up at the origin.2017-02-26
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    Depends...I'm allowing for infinite distance (like disjoint metric spaces)2017-02-26
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    Hint: Write your metric in polar coordinates (which will be the universal cover of the punctured disk).2017-02-26
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    Perfect, I did that and solved it ...thanks! I do have a follow-up question then... if I had the same problem but my domain is a closed punctured simplex and the central point is removed and repels in the same way.... is the problem solvable using similar techniques?2017-02-26
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    You would beed to check that the simplex is convex in this metric, which seems to be OK. Then the same proof goes through.2017-02-27

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