..
   Generated automatically by cpp2rst

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


.. _triqs__hilbert_space__imperative_operator:

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

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

.. rst-class:: cppsynopsis

     template<typename HilbertType, typename ScalarType, bool UseMap> class  :red:`imperative_operator`

This class is the imperative version of the [[many_body_operator]]

 It is created from a `many_body_operator` object, and is used to act on a [[state]].
 There is an optimization option `UseMap` (useful when `HilbertType = sub_hilbert_space`),
 which allows the user to give a map describing the connections between Hilbert subspaces generated by this operator.


Template parameters
-------------------

 * **HilbertType**: Hilbert space type, one of [[hilbert_space]] and [[sub_hilbert_space]]

 * **ScalarType**: Type of operator's coefficients, normally `double` or `std::complex<double>`

 * **UseMap**: Use a user-provided connection map on construction

.. warning::
    `HilbertType = sub_hilbert_space` implies that the operator generates only one-to-one connections between the used subspaces. If this not the case, one has to use `HilbertType = hilbert_space`.

Member functions
----------------

.. table::
   :widths: 40 60


   +---------------------------------------------------------------------------------+--+
   | :ref:`(constructor) <triqs__hilbert_space__imperative_operator__constructor>`   |  |
   +---------------------------------------------------------------------------------+--+
   | :ref:`is_empty <triqs__hilbert_space__imperative_operator__is_empty>`           |  |
   +---------------------------------------------------------------------------------+--+
   | :ref:`update_coeffs <triqs__hilbert_space__imperative_operator__update_coeffs>` |  |
   +---------------------------------------------------------------------------------+--+
   | :ref:`operator() <triqs__hilbert_space__imperative_operator__operator()>`       |  |
   +---------------------------------------------------------------------------------+--+

.. toctree::
    :hidden:

    imperative_operator/constructor
    imperative_operator/is_empty
    imperative_operator/update_coeffs
    imperative_operator/operator()