Teaching aid/Part3. Fundamentals of Mathematics and Mathematical Modeling . Smolensk: SGPU, 2003. - 192 s. with rice. The third part of the textbook provides the basics of mathematics and mathematical modeling . The material of the book is based on the application of the computer mathematics system Mathcad 2001 to solve mathematical problems with a high degree of visualization of the results of calculations. Considerable attention is paid to the technique of mathematical computer modeling. A large number of practical examples are given for solving mathematical problems and problems of mathematical modeling in various fields - physics, chemistry, biology and economics. For teachers and students of universities and universities of humanities and natural sciences .