The utils module contains some functions and subroutines which are used in various places in the library and which do not specifically belong to any of the other modules. Routines for the computation of some special functions, e.g., elliptic integrals, Jacobi polynomials, etc., together with some internal service routines.
To make some plots with the Gnuplot software directly from the Fortran code, we distribute a modified version of the ogpf library.