(adsbygoogle = window.adsbygoogle || []).push({}); Absolute stability question - urgent!

Hi, I wasn't too sure what section to put this in but I'm currently working on an exercise regarding absolute stability in the class Numerical Solutions of ODEs. Here is the graph i have produced on Matlab and I am suppose to comment on it. The graph shows the exact solution (black line) and the approximate solution of the given method with N = 70 when it is just stable.

http://i16.tinypic.com/2e5ky0l.jpg"

So far, I have made the comments that it can be observed that there is decreasing saw-tooth solution with smaller errors. For any values above N = 64, the errors will continue to decrease and the solution eventually converging.

But I don't know if I am on the right track, can anyone help me out? Any additional comments I have left out would be helpful!

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# Absolute stability question - !

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