Modules =============== base Definitions common in this project. logging Logging. auto_diff Automatic differentiation. opt Optimization algorithms. regularization Regularization algorithms. interp Interpolation algorithms. rbf RBF interpolation multi_double Multiple precision numbers with double numbers. constants ``constexpr`` variables and functions. roots Root-finding algorithms. functions Special functions. integration Numerical integration. ode Solvers of ordinary differential equations (ODE). linear Solvers of linear equations. util Utility common in this project.