Cactus Code Thorn CarpetAdaptiveRegrid
Thorn Author(s)     : Ian Hawke <hawke@aei.mpg.de>
Thorn Maintainer(s) : Ian Hawke <hawke@aei.mpg.de>
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Purpose of the thorn:

This is a Berger-Rigoutsos style clusterer for Carpet.

Given a GF containing an error estimate it will return to Carpet a
list of boxes for regridding purposes.