OP-00077 Lean verified Is the ideal GMRES bound sharp for every Jordan block? NA · GMRES · Jordan blocks · Krylov subspace methods · OpenProblemsInNLA
OP-00171 Partially resolved Optimal query complexity of spectral rank-k approximation NA · Krylov subspace methods · low-rank approximations · OpenProblemsInNLA · query complexity
OP-00217 Solution claimed Forsythe's conjecture beyond restart length two NA · conjugate gradient methods · Krylov subspace methods · OpenProblemsInNLA
OP-00237 Solution claimed Clustered singular-value gaps in randomized block Krylov approximation NA · Krylov subspace methods · low-rank approximations · OpenProblemsInNLA · singular value gaps