power() [1/2]

ring_elem FractionField::power ( const ring_elem f, int n ) const

virtual

Reimplemented from Ring.

Definition at line 524 of file frac.cpp.

{
  frac_elem *f = FRAC_VAL(a);
  ring_elem top, bottom;
  if (n >= 0)
    {
      top = R_->power(f->numer, n);
      bottom = R_->power(f->denom, n);
 
      if (R_->is_zero(bottom)) return set_non_unit_frac(f->denom);
    }
  else
    {
      if (R_->is_zero(f->numer))
        {
          throw exc::division_by_zero_error();
        }
      top = R_->power(f->denom, -n);
      bottom = R_->power(f->numer, -n);
 
      if (R_->is_zero(bottom)) return set_non_unit_frac(f->numer);
    }
 
  return FRAC_RINGELEM(make_elem(top, bottom));
}

References frac_elem::denom, FRAC_RINGELEM, FRAC_VAL, make_elem(), frac_elem::numer, R_, and set_non_unit_frac().