IRBLEIGS will find a few eigenvalues and eigenvectors for either the standard eigenvalue problem Ax = lambdax or the generalized eigenvalue problem Ax = lambdaM*x, where A is a sparse Hermitian matrix ...

% The characteristic equation for an 9x9 matrix to determine the 9 % eigenvalues is in general an nineth order polynomial. % By Abel's Impossibility Theorem : In general, polynomial equations higher ...