Function sequant::mbpt::csv_transform

• Defined in File csv.cpp

Function Documentation

ExprPtr sequant::mbpt::csv_transform(ExprPtr const &expr, const IndexSpace &csv_basis, std::wstring const &coeff_tensor_label, container::svector<std::wstring> const &tensor_labels)

expands CSVs in an expression in terms of a basis (standard unoccupieds, PAOs, AOs, etc.)

Parameters:

• expr – The expression to be CSV-transformed.

• csv_basis – the basis in terms of which the CSVs are expanded

• coeff_tensor_label – The label of the CSV-tranformation tensors that will be introduced.

• tensor_labels – The labels of the tensors that will be transformed

Returns:

The CSV-transformed expression if CSV-tensors with labels present in csv_tensors appear in expr. Otherwise returns the input expression itself.