# Alexandre Kirillov

Alexandre Kirillov is a professor at the University of Pennsylvania and is known for his works in the fields of Representation Theory, Topological Groups, and Lie groups. In 1962, Kirillov was the youngest Doctor of Science in the Soviet Union. During his school years, Kirillov was a winner of many mathematics competitions, and he is still an active organizer of Russian mathematics contests. Kirillov is an author of many popular school-oriented books and articles. In 2012, he became a fellow of the American Mathematical Society. |

**"A bit of old Geometry seeing from "Modern Mathematics"":** The most intriguing feature of mathematics is the unexpected relations between its different parts. I discuss the triple intersections of lines, counting of integral points in plane figures, tiling of a sphere by tangent discs and geometry of special relativity.