cimport cython @cython.locals(x=Py_ssize_t) cdef combinations(list l) @cython.locals(x1=double, x2=double, y1=double, y2=double, z1=double, z2=double, m1=double, m2=double, vx=double, vy=double, vz=double, i=long) cdef advance(double dt, long n, list bodies=*, list pairs=*) @cython.locals(x1=double, x2=double, y1=double, y2=double, z1=double, z2=double, m=double, m1=double, m2=double, vx=double, vy=double, vz=double) cdef report_energy(list bodies=*, list pairs=*, double e=*) @cython.locals(vx=double, vy=double, vz=double, m=double) cdef offset_momentum(tuple ref, list bodies=*, double px=*, double py=*, double pz=*) cpdef test_nbody(long iterations)