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Sep 29, 2013 at 17:11 comment added Matthias Ludewig The example shows that you are wrong, user36539. It is an operator with uncountably many ACTUAL eigenvectors to differnt eigenvalues in the SAME Hilbert Space!
Sep 28, 2013 at 10:20 comment added user36539 in a separable HS the basis is countable. you probably mean a continuum of "eigenvectors" which belong to a space wider than HS (Dirac)
Sep 27, 2013 at 20:57 comment added Matthew Daws Separable = countable dense subset...
Sep 27, 2013 at 18:16 comment added user36539 How this can be possible if we work in a separate Hilbert space ? Yes we may have a continuum of spectral values but certainly not a continuum of eigenvectors !
Oct 15, 2011 at 21:26 vote accept Matthias Ludewig
Oct 15, 2011 at 19:28 history answered Matthew Daws CC BY-SA 3.0