Experimenting recently with some quantum problems I've decided that it's time to add some long overdue algorithmic support for module QuantumVector. So here are two new modules added to our collection: http://www.numeric-quest.com/haskell/LinearAlgorithms.hs http://www.numeric-quest.com/haskell/Eigensystem.hs The former partially overlaps with module Orthogonals, but their most important algorithms are different, although both modules use lists for representation of matrices. This is still work in progress, but usable as it is for Hermitian matrices. Both modules are thoroughly documented, so here are just few buzzwords: Housholder reduction, complex reflection, Hessenberg matrix, similarity, triangularization, tridiagonalization, operators and maps. Jan