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


.. _triqs__hilbert_space__sub_hilbert_space__get_state_index:

triqs::hilbert_space::sub_hilbert_space::get_state_index
========================================================

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



**Synopsis**

 .. rst-class:: cppsynopsis

       | int :red:`get_state_index` (fock_state_t :param:`f`) const





Find the index of a given Fock state within this subspace





Parameters
^^^^^^^^^^

 * :param:`f` Fock state in question


Returns
^^^^^^^

State index