Vladimir Vladimirovich Dragan

Feodor Dragan

1 I n t r o d u c t i o n All graphs in this paper are connected and simple, i.e. finite, undirected, loopless and without multiple edges. In a graph G = (V, E) the length of a path from a vertex v to a vertex u is the number of edges in the path. The distance d(u, v) from vertex u to vertex v is the length of a minimum length path from u to v and the interval I(u, v) between these vertices is ...

vitamin a and the nervous system DRAGAN

Vitamin A is essential for the early development and normal functioning of the brain throughout life. A deficiency of vitamin A is one of the leading causes of morbidity and mortality in developing countries, and subclinical deficiency is probably present worldwide. The main active molecule in vitamin A is retinoic acid, which is involved in vision, the immune system, skin health, olfaction and...

Vladimir Marik

The increasing demand for the use of database systems as an integrating factor in CAD/CAM applications has necessitated the development of database systems with appropriate modelling and retrieval capabilities. One essential problem is the treatment of geometric data which has led to the development of spatial databases. Unfortunately, most proposals only deal with simple geometric objects like...

INSTALLATIONS Vladimir

Memories of Vladimir Arnold

1. Dima Arnold in my life, by Dmitry Fuchs Unfortunately, I have never been Arnold’s student, although as a mathematician, I owe him a lot. He was just two years older than I, and according to the University records, the time distance between us was still less: when I was admitted to the Moscow State University as a freshman, he was a sophomore. We knew each other, but did not communicate much....