homogenize() [2/2]

ring_elem LocalRing::homogenize ( const ring_elem f, int v, int deg, const std::vector< int > & wts ) const

virtual

Reimplemented from Ring.

Definition at line 432 of file localring.cpp.

{
  int d1, d2, lo1, lo2;
  ring_elem top, bottom;
  const local_elem *f = a.get_local_elem();
  mRing->degree_weights(f->numer, wts, lo1, d1);
  mRing->degree_weights(f->denom, wts, lo2, d2);
  if (deg >= d1 - d2)
    {
      top = mRing->homogenize(f->numer, v, deg + d2, wts);
      bottom = mRing->homogenize(f->denom, v, d2, wts);
    }
  else
    {
      top = mRing->homogenize(f->numer, v, d1, wts);
      bottom = mRing->homogenize(f->denom, v, -deg + d1, wts);
    }
  local_elem *result = make_elem(top, bottom);
  return ring_elem(result);
}

References local_elem::denom, ring_elem::get_local_elem(), make_elem(), mRing, local_elem::numer, and result().