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Commit 6e9d5b16 authored by Max Kahnt's avatar Max Kahnt
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Fix TruncatedBlockGSStep localExactSolve.

Implementation mistakenly changed the solved system for indefinite
matrices with diagonal entries of value 0.

The idea is to also be able to tackle systems that are semi-definite
due to trivial rows by simply not altering the initial x in these components.
This was accomplished by setting the corresponding diagonal entry to 1.

Updated the check for trivial rows such that it is not triggered
if only the diagonal element is zero but only the entire row.
parent 5750cf1b
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