David Hertz 2023. Simple Optimal Algorithm for Solving Rank-r Complex Equations Ax = b Rendering Sparse Solution xS with Support Surprisingly Confined to the Indices of r Independent Columns of A. Research and Applications Towards Mathematics and Computer Science Vol. 4. (Sep. 2023), 119–130. DOI:https://doi.org/10.9734/bpi/ratmcs/v4/10806F.