Several numerical mathematical utilities. For example, utilities for solving the Quadratic, Cubic, and Quartic Equations; solving N Equations in N Unknowns; Eigenvalues and Eigenvectors; and more.
M. Kunick, H. Kretzschmar, and U. Gampe. Proceedings of the 15th International Conference on the Properties of Water and Steam, Düsseldorf, Verein Deutscher Ingenieure-Gesellschaft für Energie und Umwelt, (2008)