MathDB
MMO 040 Moscow MO 1938 max no of parts n planes divide space

Source:

July 18, 2019
combinatoricscombinatorial geometrygeometry3D geometryplanes

Problem Statement

What is the largest number of parts into which nn planes can divide space?
We assume that the set of planes is non-degenerate in the sense that any three planes intersect in one point and no four planes have a common point (and for n=2 it is necessary to require that the planes are not parallel).