Which mathematician defined the Voronoi diagram, Mikhail Kravchuk or Georgy Voronoy?
Mikhail Kravchuk Mykhailo Pylypovych Kravchuk, also Krawtchouk (Ukrainian: Миха́йло Пили́пович Кравчу́к ) (September 27, 1892 – March 9, 1942), was a Soviet Ukrainian mathematician who, despite his early death, was the author of around 180 articles on mathematics.
Delannoy number In mathematics, a Delannoy number formula_1 describes the number of paths from the southwest corner (0, 0) of a rectangular grid to the northeast corner ("m", "n"), using only single steps north, northeast, or east. The Delannoy numbers are named after French army officer and amateur mathematician Henri Delannoy.