}

# Preface

In this section, we extend Picard iterations for systems of first order differential equations written in normal form $$\dot{\bf x} = {\bf f}(t, {\bf x}) .$$ Although this method is rarely used for actual evaluations due to slow convergence and obstacles with performing explicit integrations, it is very important for understanding material. Working with Picard's iterations and its refinements helps everyone to develop computational skills.

Introduction to Linear Algebra with Mathematica

# Orthogonal polynomials

1. Bayatbabolghani, F. and Parand, K., A Comparison between Laguerre, Hermite, and Sinc orthogonal functions, 2017, 31 pages.