n tetrahedra, any 2 have at least 2 common vertices, any 3 at most 1
Source: 1996 Estonia National Olympiad Final Round grade 12 p5
March 11, 2020
combinatorial geometrycombinatoricstetrahedron
Problem Statement
Suppose that teterahedra are given in space such that any two of them have at least two common vertices, but any three have at most one common vertex. Find the greatest possible .