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


.. _triqs__hilbert_space__hilbert_space__get_fock_state:

triqs::hilbert_space::hilbert_space::get_fock_state
===================================================

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



**Synopsis**

 .. rst-class:: cppsynopsis

    1. | fock_state_t :red:`get_fock_state` (int :param:`i`) const

    2. | fock_state_t :red:`get_fock_state` (:ref:`fundamental_operator_set <triqs__hilbert_space__fundamental_operator_set>` const & :param:`fops`,
       |                 std::set<fundamental_operator_set::indices_t> const & :param:`indices`) const

Documentation



 **1)**   Return the `i`-th basis element as a Fock state



 **2)**   Return the Fock state generated by a product of creation operators with given indices





Parameters
^^^^^^^^^^

 * :param:`i` Index of the basis state

 * :param:`fops` Fundamental operator set used to construct this Hilbert space

 * :param:`indices` An ordered set of index sequences (see `indices_t` in [[fundamental_operator_set]])


Returns
^^^^^^^

Fock state