[Help-gsl] Question regarding integration.

[Jigal Aharonovich]

Hi there,

I need to integrate a vector function of a scalar variable, namely, a 
set of functions
parameterized with the same parameter.
All function share a common factor, which is also a function.

I see the following options:

1. Regardless of the common factor, integrate them as separate functions,
   with the quadpack set of the integrators.
   (well, choosing one of the integrators, that is...)
   This pays the penalty of recalculating the factor function for all 
integrator instances.

2. Integrate them as an ODE set, where there are no mutual dependencies 
between them.
   However, in each ODE step, the factor function is computed only once.

Questions:
1. What would you recommend?
2. Pardon my ignorance, but are these methods equivalent, in the 
numerical sense?

Kinds regards,
Jigal.