:term:`USE_DF_INTS <USE_DF_INTS (FNOCC)>`
"""""""""""""""""""""""""""""""""""""""""

      Use 3-index integrals to generate 4-index ERI's? This keyword is used for testing purposes only. Changing its value will have no effect on the computation. 

      * **Type**: :ref:`boolean <op_c_boolean>`
      * **Default**: false

