This paper was published first in SELF Transactions, 1 (1994), pp.77-94 (Eney, Ukraine, English, 118 pp.). It is introducing to   cycle devoted to the new branch of the theory of complex variable  non-conformal mapping and its application to the calculation of complex dynamical fields. It is very simple but necessary as the basic for the following papers. As this edition had a small circulation, we decided to upload this paper to our archive at   http://angelfire.lycos.com/la3/selftrans   and to the mp_arc, to give the Readers the opportunity to look through the paper which we will often quote in the following papers of this cycle. The more that we will apply this technique in other research directions of laboratory SELF. We will be pleased if you visit our electronic journal SELF Transactions. We will be the more pleased if you find there a responce to your thoughts and research directions. We will be pleased much more, receiving your opinion of our results. We are willing to answer your questions and discuss with you any problems having something in common with our developments.