Hi, The following examples compiles from the notebook
%cython cimport sage.gsl.ode import sage.gsl.ode include 'gsl.pxi' cdef class van_der_pol(sage.gsl.ode.ode_system): cdef double beta def __cinit__(self, double beta=1.0): self.beta = beta cdef int c_f(self,double t, double *y,double *dydt): dydt[0]=y[1] dydt[1]=-y[0]-self.beta*y[1]*(y[0]*y[0]-1) return GSL_SUCCESS cdef int c_j(self, double t,double *y,double *dfdy,double *dfdt): dfdy[0]=0 dfdy[1]=1.0 dfdy[2]=-2.0*10*y[0]*y[1]-1.0 dfdy[3]=-10*(y[0]*y[0]-1.0) dfdt[0]=0 dfdt[1]=0 return GSL_SUCCESS However if I put it in a file vander.pyx (say) and use the following setup.py - from distutils.core import setup from distutils.extension import Extension from Cython.Distutils import build_ext ext = Extension("vander", ["vander.pyx"], include_dirs = ['/home/rajeev/bin/sage/devel/sage-main/sage/gsl/']) setup(ext_modules=[ext], cmdclass = {'build_ext': build_ext}) I get the following error - cdef class van_der_pol(sage.gsl.ode.ode_system): ^ ------------------------------------------------------------ vander.pyx:10:5: 'ode_system' is not declared I guess the problem is with the setup.py. Can someone tell me how to do this? Thanks in advance. Rajeev -- 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