Evan Ward created MATH-1024:
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Summary: LU and QR have different default singularity thresholds
Key: MATH-1024
URL: https://issues.apache.org/jira/browse/MATH-1024
Project: Commons Math
Issue Type: Bug
Affects Versions: 3.2
Reporter: Evan Ward
Priority: Minor
LU uses 1e-11 and QR uses 0. This means by default QR never throws a
Singularity exception. This caused divergence to go unreported in
GaussNewtonOptimizer when it uses QR. I think a consistent default should be
chosen. I will make the threshold explicit in GaussNewton.
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