The decomposition classes of LAPACK.h++ are low-level, concrete, efficient, implementations of the basic orthogonal decompositions of linear algebra. Three decompositions are directly supported:
The singular value decomposition
The QR decomposition
The complete orthogonal decomposition.
An excellent use of these classes is as building blocks for classes meant to handle more specific sorts of problems. The least squares decomposition classes are an example of this approach.
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