[vtkusers] LUFactorLinearSystem - How to get L and U?

[David Doria]

Here is a little example that tries to factor the matrix
[4 3]
[6 3]

http://www.vtk.org/Wiki/VTK/Examples/Broken/LUFactorization

The documentation says "Output factorization LU is in matrix A" (it is
written over the matrix that is passed in). I don't understand this
though - the matrix is 2x2, and there are 3 non-zero entries of each
of L and U (for a total of 6). Can anyone explain how to get L and U?

Thanks,

David