++ incorporated into https://github.com/JuliaLang/IterativeSolvers.jl ++ Induced Dimension Reduction method IDR(s) for solving general non-symmetric linear equations using a Krylov method, for example ordinary linear equations or Sylvester and Stein equations.
A Julia package for defining and working with linear maps, also known as linear transformations or linear operators acting on vectors. The only requirement for a LinearMap is that it can act on a vector (by multiplication) efficiently.
Symmetric matrix as a list of the values in its upper or lower triangular part. Useful for representing pairwise measures or comparisons when the used metric or distance satisfies the symmetry condition and for adjacency matrices of undirected graphs.