[sage-support] Diagonalizing (symmetric) matrices with entries in a rational function field

I have a symmetric matrix that I want to diagonalize, such as x y z y 0 xy z xy xyz x, y, z being variables, and the base field is CC (complex numbers). I typed in the following: R.=CC[] m=matrix(R,[[x,y,z],[y,0,x*y],[z,x*y,x*y*z]]) m.eigenvalues() and I get an error message (NotImple

[sage-support] Sage startup problem

I installed sage on a ubuntu system using the binary file (sage-4.7- linux-64bit-ubuntu_10.04.1_lts-x86_64-Linux.tar.lzma). Then when I try to start it up, I get the following: -- | Sage Version 4.7, Release Date: 2011-05-23