skew_schur()

ring_elem SchurRing2::skew_schur ( const_schur_partition lambda, const_schur_partition p )

private

Definition at line 836 of file schur2.cpp.

{
  SMcurrent = 0;
 
  SMfinalwt = 0;
  for (int i = 1; i < p[0]; i++) SMfinalwt += p[i];
  for (int i = 1; i < lambda[0]; i++) SMfinalwt -= lambda[i];
  SMmaxrows = p[0] - 1;  // this is the number of elements in the partition p
  if (nvars != -1 && SMmaxrows > nvars) SMmaxrows = nvars;
 
  delete[] SMtab
      .p;  // FLAG: should use gc for this?  or not use it, but not both!
  SMtab.p = new int[SMmaxrows + 1];  // FLAG: should use gc for this?  or not
                                     // use it, but not both!
  for (int i = 0; i <= SMmaxrows; i++) SMtab.p[i] = 0;
 
  SMtab.wt = SMfinalwt;
  SMtab.resize(SMfinalwt);
  SMfilled.resize(SMfinalwt);
 
  // lambda and p should not be modified in the following call
  SMfilled.fill(const_cast<schur_partition>(lambda),
                const_cast<schur_partition>(
                    p));  // FLAG:fill should take const arguments...
  lambda++;               // FLAG: why is this here?
  p++;                    // FLAG: why is this here?
  SM();
  return SMheap->value();  // resets itself back to new
}

References nvars, p, SM(), SMcurrent, SMfilled, SMfinalwt, SMheap, SMmaxrows, and SMtab.

Referenced by mult_terms().