.. _`table:grad_cfour`:

    +-------------------------+---------------------------------------------------------------------------------------+
    | name                    | calls method in Stanton and Gauss's CFOUR program :ref:`[manual] <sec:cfour>`         |
    +=========================+=======================================================================================+
    | c4-scf                  | Hartree--Fock (HF)                                                                    |
    +-------------------------+---------------------------------------------------------------------------------------+
    | c4-mp2                  | 2nd-order Moller-Plesset perturbation theory (non-density-fitting) (MP2)              |
    +-------------------------+---------------------------------------------------------------------------------------+
    | c4-mp3                  | 3rd-order Moller-Plesset perturbation theory (MP3)                                    |
    +-------------------------+---------------------------------------------------------------------------------------+
    | c4-mp4(sdq)             | 4th-order MP perturbation theory (MP4) less triples                                   |
    +-------------------------+---------------------------------------------------------------------------------------+
    | c4-mp4                  | full MP4                                                                              |
    +-------------------------+---------------------------------------------------------------------------------------+
    | c4-cc2                  | approximate coupled cluster singles and doubles (CC2)                                 |
    +-------------------------+---------------------------------------------------------------------------------------+
    | c4-ccsd                 | coupled cluster singles and doubles (CCSD)                                            |
    +-------------------------+---------------------------------------------------------------------------------------+
    | c4-cc3                  | approximate CC singles, doubles, and triples (CC3)                                    |
    +-------------------------+---------------------------------------------------------------------------------------+
    | c4-ccsd(t)              | CCSD with perturbative triples (CCSD(T))                                              |
    +-------------------------+---------------------------------------------------------------------------------------+
    | c4-ccsdt                | coupled cluster singles, doubles, and triples (CCSDT)                                 |
    +-------------------------+---------------------------------------------------------------------------------------+
    | cfour                   | **expert** full control over cfour program                                            |
    +-------------------------+---------------------------------------------------------------------------------------+