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Question: Bug in contourplot?

Question:Bug in contourplot?

w-Teilchen 80 Maple
plot contourplot
May 03 2017
2

Hi everyone,

as a very basis example I've tried to get the equipotential lines of an 1/r² potential in the x-y-plane using contourplot. However, I obtained the following very strange result. Do you get the same mistake or is there something wrong on my end?

Thanks in advance,
Sören


 

> 

with(plots):
> 

plots:-contourplot(1/(x^2+y^2), x = -2 .. 2, y = -2 .. 2)

 
> 

plots:-contourplot(1/(x^2+y^2), x = -2 .. 2, y = -2 .. 2, contours = 5, numpoints = 100)

 
> 

plots:-contourplot(1/(x^2+y^2), x = -2 .. 2, y = -2 .. 2, contours = 5, numpoints = 1000)

 
> 

plots:-contourplot(1/(x^2+y^2), x = -2 .. 2, y = -2 .. 2, contours = 5, numpoints = 10000)

 
> 

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