..
   Generated automatically by cpp2rst

.. highlight:: c
.. role:: red
.. role:: green
.. role:: param


.. _triqs__hilbert_space__imperative_operator__constructor:

triqs::hilbert_space::imperative_operator::constructor
======================================================

*#include <triqs/hilbert_space/imperative_operator.hpp>*



**Synopsis**

 .. rst-class:: cppsynopsis

    1. | :red:`imperative_operator` ()

    2. | :red:`imperative_operator` (triqs::operators::many_body_operator_generic<scalar_t> const & :param:`op`,
       |                    :ref:`fundamental_operator_set <triqs__hilbert_space__fundamental_operator_set>` const & :param:`fops`,
       |                    imperative_operator::hilbert_map_t :param:`hmap` = hilbert_map_t(),
       |                    const std::vector<sub_hilbert_space> \* :param:`sub_spaces_set` = nullptr)

Documentation



 **1)**   Construct a zero operator



 **2)**   Constructor from a `many_body_operator` and a `fundamental_operator_set`





Parameters
^^^^^^^^^^

 * :param:`op` Source `many_body_operator` object

 * :param:`fops` [[fundamental_operator_set]]; must contain all index sequences met in `op`

 * :param:`hmap` Map of subspaces-to-subspaces connections generated by `op` (only for `UseMap = true`)

 * :param:`sub_spaces_set` Pointer to a vector of all Hilbert subspaces referred by `hmap` (only for `UseMap = true`)