.. _method-multifidelity_function_train-arithmetic_tolerance:

""""""""""""""""""""
arithmetic_tolerance
""""""""""""""""""""


A secondary rounding tolerance used for post-processing


.. toctree::
   :hidden:
   :maxdepth: 1



**Specification**

- *Alias:* None

- *Arguments:* REAL

- *Default:* 1.e-10


**Description**


After forming one or more function train approximations, this
tolerance is used for rolling up final results, in particular,
combining multilevel/multifidelity expansions and forming products for
higher-order moment estimation.  It is generally intended as a looser
tolerance than ``rounding_tolerance``.

*Default Behavior*

If this tolerance is not specified, then we adopt the internal C3 default.