nMatrix is a C++ interface to lapack and blas.

nMatrix differs from uMatrix only for the
memory storage :

 - in uMatrix a matrix is stored row by row

 - in nMatrix a matrix is stored column by column


 I have created nMatrix from uMatrix to use it in the Sparsa library
 In the Sparsa library one needs to to operation between eigenvectors
 that are stored in a matrix columns by column.
 The operation of storing and retrieving eigenvectors are faster
 when they are stored columns by columns