nep-pack/NonlinearEigenproblems.jl

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NEP-PACK A nonlinear eigenvalue problem is the problem to determine a scalar λ and a vector v such that M(λ)v=0 where M is an nxn-matrix depending on a parameter. This package aims to provide state-of-the-art algorithms to solve this problem, as well as a framework to formulate applications and easy access to benchmark problems. This currently includes (but is not restricted to) Newton-type methods, Subspace methods, Krylov methods, contour integral methods, block methods, companion matrix approaches....