Re: [Help-gsl] rk4

[Jochen Küpper]

Dear Brian,

have you ever been able to resolve this issue?

On 26.06.2007, at 20:28, Brian Powell wrote:

> This email is in reference to what appears to be a notable change in  
> performance of the rk4 integrator between older and newer versions  
> of gsl. In particular, rk4 from version 1.5 and version 1.8.  The  
> particular test that I am performing is I am integrating a system of  
> ODE's from some initial point to some final point, then reversing  
> the integration.  Clearly, one expects such evolutions to overlap.   
> Surprisingly, they overlap quite well with the older version of rk4,  
> but they do not match up well at all with the newer version.  I'm  
> trying to track down the cause of this, and, so far, can't seem to  
> find a system specific reason for this.

Greetings,
Jochen
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