Hello, I think I found a bug in the eigenvalues method of Matrices over QQbar: Eigenvalues that are found over AA are not found when using QQbar.
H_AA = Matrix(AA, 8, lambda i, j: 1/(i + j + 1)) H_QQbar = Matrix(QQbar, 8, lambda i, j: 1/(i + j + 1)) E_AA = H_AA.eigenvalues() E_QQbar = H_QQbar.eigenvalues() print len(E_AA) print len(E_QQbar) This gives 8 for the first and 7 for the second value. H_QQbar.eigenspaces_right() reports a multiplicity of one for each eigenvalue. This is on sagenb.org, Version 4.7.2, the same appears in 4.7 E_AA = [1.695938996921950?, 0.2981252113169308?, 0.02621284357811905?, 0.001467688117741868?, 0.00005436943369749943?, 1.294332091872812?e-6, 1.798873745817577?e-8, 1.111538966372443?e-10] E_QQbar = [1.695938996921950?, 0.2981252113169308?, 0.02621284357811905?, 0.001467688117741868?, 0.00005436943369749943?, 1.294332091872812?e-6 + 0.?e-82*I, 1.111538966372443?e-10] -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
