chern_maker.cpp

#include "chern_maker.H"
using namespace std;




void Chern_Maker::start(RepresentationRing *thesource, 
                        GradedAlgebra<F_2> *thetarget){

  Exponentiator<F_2>::start(thesource, thetarget, string("c"), 2);
}


void Chern_Maker::create_regular_variables(string prefix){
  long i, j, dim;
  QQ d;
  Polynomial<F_2> zero_poly;
  ostringstream autoname;
  
  // looks for the largest dimension
  dim= 0;
  for(i=1; i <= source->variables_in_use(); i++){
    d= source->epsilon[i];
    if( d > dim)
      dim= ZZtolong(d);
  }
  
  max_dim= dim;
  
  var.resize(source->variables_in_use() +1, dim+1);
  zero_poly.alphabet= target;
  zero_poly.sets_to_zero();
  
  //now create the variables and populate var
  for(i=1; i <= source->variables_in_use(); i++){
    dim= ZZtolong( source->epsilon[i] );
    for(j=1; j<= dim; j++){ 
      if( (source->schur_indices[i] == 4) && (j % 2 != 0) )
        var(i,j)= zero_poly;
      else{
        autoname.str("");
        autoname << prefix << "_" << j
                 << "(" << source->nameof(i) << ")";
        var(i,j)= target->new_variable(autoname.str(), factor*j);
      }//else
    }//for
  }//for


}

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