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The present research paper deals with the problem for determining the optimal positioning of units in logistics system aiming the minimization of the transportation costs for providing communication between the units. For the purposes of the research a logistics system is treated as relatively stable set of units (structural and/or functional subunits of the company but also suppliers, consumers and logistical mediators) connected to each other and united in one management of the logistical process for realizing t...

Economically justified solutions concerning the European transport system are crucial for the competitiveness of the Alliance throughout the World, for the financial growth, for reducing the unemployment and for improving the standards of living. It is exactly the free movement of people across the borders which is one of the four types of freedom typical for the European citizens, together with the free transportation of goods, services and capital. For realizing the mobility of its citizens each country creates ...

Background: Originality is the main specific feature of mathematical Olympiad problems. Formulating these problems requires a special kind of creativity and only a few people have this ability. They are called problem composers, and Rosen Nikolaev is one of them. H? creates mathematical tasks every day. More than 14 of them have been selected for the The National Student Olympiad in Mathematic and more than 40 for the Bulgarian Mathematical Olympiad. Such specialists are unique, not only because of their special a...