Dear all,
I have a parameter defined as
struct parameter{ double wave_num;
bool partial;
int count;
};
I pass this parameter and the Jacobian to gsl_odeiv2_system and every thing
works fine the first time around. But if I immediately call the solver again
the integration fails. I am pretty sure it is a bug in step_bsimp because
the error does not appear with other solvers. For example
gsl_odeiv2_step_msbdf or for that matter even if I use gsl_odeiv2_step_rk8pd
(which is not really recommended for stiff problems) every thing works just
fine.
So I am reporting that with a parameter defined like above and on the second
and third calls to gsl_odeiv2_step_bsimp it fails. gsl_odeiv2_step_msbdf
works just fine, which lead me to conclude that bsimp has a bug.
Can someone please say something about which is the preffered stiff solver?
bsimp or msbdf?
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