ASU 530 All Soviet Union MO 1990 million unit cubes, lattice, decompose
Source:
August 14, 2019
combinatoricscombinatorial geometrylattice points
Problem Statement
A cube side is divided into a million unit cubes with faces parallel to the large cube. The edges form a lattice. A prong is any three unit edges with a common vertex. Can we decompose the lattice into prongs with no common edges?