ApproximateCoulombVertex.hpp

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#ifndef APPROXIMATE_COULOMB_VERTEX_DEFINED
#define APPROXIMATE_COULOMB_VERTEX_DEFINED
 
#include <algorithms/Algorithm.hpp>
#include <util/Tensor.hpp>
 
namespace sisi4s {
/* @WIKI
 * \brief Approximates the Coulomb vertex $\tilde\Gamma^q_{rG}$
 * using the given set of left singular vectors $U^F_G$ associated to the
 * $\Gamma^q_{rF} = {U^\ast}^G_F \tilde\Gamma^q_{rG}$.
 * largest singular values, The approximated Coulomb vertex is given by
 * \param[in] CoulombVertex (complex tensor) (none)
 *   The Coulomb vertex $\tilde\Gamma$ to approximate.
 * \param[in] EnergyMatrixTransform tensor none
 *   The left singular vectors $U$ to be used in the transformation.
 * \param[out] ApproximatedCoulombVertex tensor
 *   The approximated Coulomb vertex $\Gamma$.
 */
class ApproximateCoulombVertex : public Algorithm {
public:
  ALGORITHM_REGISTRAR_DECLARATION(ApproximateCoulombVertex);
  ApproximateCoulombVertex(std::vector<Argument> const &argumentList);
  virtual ~ApproximateCoulombVertex();
  virtual void run();
  virtual void dryRun();
};
} // namespace sisi4s
 
#endif