Graeco-Latin square

A Greco- Latin square or Eulerian square is a square of size n scheme with n rows and n columns, in which each of the fields in a character from a set G and a is entered from a different set L.

In this case, each element of G and also each element of L must appear exactly once in each row and in each column, and each tuple must appear exactly once in the entire square.

A Greco- Latin square is a generalization of the so-called Latin square. While it comes to a lot of the latin square design, it comes to the Greek square around two quantities. The concept was introduced by Leonhard Euler, who used as elements of the sets G and L letters of the Greek or the Latin alphabet. This led to the name.