.. _method-ncsu_direct-min_boxsize_limit:

"""""""""""""""""
min_boxsize_limit
"""""""""""""""""


Stopping Criterion based on shortest edge of hyperrectangle


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**Specification**

- *Alias:* None

- *Arguments:* REAL

- *Default:* 1.0e-4


**Description**


``min_boxsize_limit`` is a setting that terminates the optimization
when the measure of a hyperrectangle S with f(c(S)) = fmin is less
than min_boxsize_limit.

Each subregion considered by DIRECT has a \b size, which corresponds
to the longest diagonal of the subregion.

``min_boxsize_limit`` specification terminates DIRECT if the size of
the smallest subregion falls below this threshold.

In practice, this specification is likely to be more effective at
limiting DIRECT's search.


