This a Rust wrapper for COBYLA optimizer (COBYLA stands for Constrained Optimization BY Linear Approximations) algorithm for minimizing a function of many variables. The method is derivatives free (only the function values are needed) and accounts for constraints on the variables. The algorithm is described in:
M.J.D. Powell, "A direct search optimization method that models the objective and constraint functions by linear interpolation," in Advances in Optimization and Numerical Analysis Mathematics and Its Applications, vol. 275 (eds. Susana Gomez and Jean-Pierre Hennart), Kluwer Academic Publishers, pp. 51-67 (1994).