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Luc Maisonobe 335572b99e Prevent NaN to occur for singular matrices

Numerical inaccuracies in the underlying eigendecomposition could induce
very small negative eigenvalues, so the square root produced NaNs. The
eigenvalues really cannot be negative, so it is safe to replace the negative
ones by 0.
There are remaining problems with singular matrices:
 - the singular vectors also contain NaNs
 - the solver does not really work in least square sense and
   complain about singular matrices
JIRA: MATH-320 

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@885279 13f79535-47bb-0310-9956-ffa450edef68

2009-11-29 21:53:36 +00:00

src

Prevent NaN to occur for singular matrices

2009-11-29 21:53:36 +00:00

build.xml

Updated to reflect 2.0 release.

2009-08-07 01:16:00 +00:00

checkstyle.xml

tighten checkstyle rules: declaring multiple variables in one statement is now forbidden

2009-10-16 14:51:55 +00:00

doap_math.rdf

Add AL header