truncate()

ring_elem SchurRing2::truncate ( const ring_elem f ) const

protected

Definition at line 512 of file schur2.cpp.

{
  if (is_zero(f)) return f;
  const schur_poly *f1 = f.get_schur_poly();
  schur_poly *result = new schur_poly;
 
  for (schur_poly::iterator i = f1->begin(); i != f1->end(); ++i)
    {
      if (i.getMonomial()[0] - 1 > nvars) continue;
      result->appendTerm(i.getCoefficient(), i.getMonomial());
    }
  return ring_elem(result);
}

References schur_poly::begin(), schur_poly::end(), is_zero(), nvars, and result().

Referenced by lift(), and promote().