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Created by Kilian Weishaupt@kilian.weishauptContributor

[UMFPack] Allow to set UMFPACK_ORDERING via ParameterTree

We have recently found a case where a different choice of the UMFPACK_ORDERING method (see page 17 here) decreases the linear solve time by a factor of 4.

It would be very convenient to set the ordering via the ParameterTree, using the new interface.

Edited by Kilian Weishaupt