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Jutho / KrylovKit.jl

Krylov methods for linear problems, eigenvalues, singular values and matrix functions
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Finding repeated eigenvalues #44

Closed smukhe-gh closed 3 years ago

smukhe-gh commented 3 years ago

Hi, is there a way to output all the eigenvectors corresponding to the same eigenvalue? Currently, I get 

Invariant subspace of dimension 1 (up to requested tolerance `tol = 1.0e-12`), which is smaller than the number of requested eigenvalues (i.e. `howmany == 2`); setting `howmany = 1'.

Is there a way around this, or is this a limitation of iterative methods in general?

Thanks

Jutho commented 3 years ago

Read my response to a similar question on Julia Discourse here:

https://discourse.julialang.org/t/possible-bug-in-krylovkit-eigsolve/55962/9

smukhe-gh commented 3 years ago

Thanks for the pointer!