HP49-50G : Eigenvalues & eigenvectors

[Werner]

There are a few things at work here..
1. EGV in approx mode returns the characteristic or generalised eigenvectors for repeated eigenvalues - except that here, it doesn't ;-) that's a bug IMHO
2. EGV in exact mode doesn't do that because people kept complaining about getting 'wrong' eigenvectors. Bernard Parisse changed the behaviour of EGV in exact mode somewhere along the line, see last comment here
3.In case of doubt, use JORDAN that will give you the correct result, and tags the vectors with :Char: for characteristic or :Eigen: for eigenvector (on my 49G).

Cheers, Werner