2 * dlae2.f has better handling of 2x2 eigenvalues than our qrstep.c
4 * Document Jacobi eigen function, in particular that it only works for
7 * add support for nonsymmv left eigenvectors?:
9 gsl_eigen_nonsymmv_params(const int lr)
11 to specify whether we should compute left/right eigenvectors (or both).
13 If they want both, we'll need a new function:
15 gsl_eigen_nonsymmv_lr(..., evec_r, evec_l, ...)
17 gsl_eigen_nonsymmv_lr_Z(...)