nekStab / LightKrylov

Lightweight implementation of Krylov subspace techniques in Fortran.
BSD 3-Clause "New" or "Revised" License
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Add the residual computation for `eighs` and `svds` #19

Closed loiseaujc closed 1 year ago

loiseaujc commented 1 year ago

At the moment, only eigs which is based on arnoldi_factorization actually returns the residuals associated with each of the eigenpairs computed. We need to implement this computation for eighs and svds as well. I'll try to find the references where the expression for these residuals are given.