contraction_seq_optimizer.hpp

 
#ifndef EXATN_NUMERICS_CONTRACTION_SEQ_OPTIMIZER_HPP_
#define EXATN_NUMERICS_CONTRACTION_SEQ_OPTIMIZER_HPP_
 
#include "tensor_basic.hpp"
 
#include <list>
#include <memory>
#include <functional>
 
namespace exatn{
 
namespace numerics{
 
//Tensor contraction triple:
struct ContrTriple{
 unsigned int result_id; //id of the tensor-result (new)
 unsigned int left_id;   //id of the left input tensor (old)
 unsigned int right_id;  //id of the right input tensor (old)
};
 
class TensorNetwork;
 
 
class ContractionSeqOptimizer{
 
public:
 
 virtual ~ContractionSeqOptimizer() = default;
 
 virtual double determineContractionSequence(const TensorNetwork & network,
                                             std::list<ContrTriple> & contr_seq,
                                             std::function<unsigned int ()> intermediate_num_generator) = 0;
};
 
using createContractionSeqOptimizerFn = std::unique_ptr<ContractionSeqOptimizer> (*)(void);
 
} //namespace numerics
 
} //namespace exatn
 
#endif //EXATN_NUMERICS_CONTRACTION_SEQ_OPTIMIZER_HPP_