Elements of applied mathematics. 6th edition. Zeldovich Ya.B., Myshkis A.D.

The tasks of physics, technology and practical calculations use numerical and graphic methods, rows. The book contains useful techniques of such calculations. In a visual form, basic information is given about the complex variable, linear differential equations, vectors and vector fields and variational calculation. Formal evidence in most cases are replaced by leading considerations; Due to this, simplification has been achieved and the application of mathematical concepts is facilitated. Some physical tasks are analyzed in detail, in particular related to optics, mechanics, probability theory.