Kneser Arrays
Wolfram Demonstrations Project · 2008
Start with a set of numbers and find all the subsets of a given size For example 1 2 3 4 has six subsets of size 2 1 2 1 3 1 4 2 3 2 4 and 3 4 Consider 1 2mdashit shares 2 values with itself 1 value with 1 3 and 0 values with 3 4 An array of the amount of intersection shows an interesting pattern