Here is the result of my experiment. f=integrate(1/(sin(x)**2+log(x)),(x,1,t)) ; f
f=f.function(t) ; f Now I expect f to be a function. I am right to do so? If I do f.derivative() , I obtain an error. Because f is definied to be the primitive of a given function, the derivative of f is well defined. Is it just something that sage cannot handle or Have I misunderstood something. I would like to be able to consider a function given by the primitive of a given function. Even if it cannot be expressed in terms of standard math function, a lot of things can be done with this function, for example to find the derivative of which. What I say for primitive can also be said for ODE, etc... What sage can be done about that. I am new to sage and I am a little lost, I find nothing pertinent in the tutorial and I am lost with the huge reference manual . -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org