ABSTRACT
In this chapter, the parameters t, k and v are positive integers such that 0 < t < k ≤ v; moreover, the groups and sets considered are finite. The collection of all k-subsets of a finite set X is denoted by ( X k ) https://s3-euw1-ap-pe-df-pch-content-public-u.s3.eu-west-1.amazonaws.com/9780429280092/903cf4ed-cbd9-4ecc-bd90-95916cd1752b/content/inline-math16_1.jpg"/> . We denote the Galois field of order q by F q https://s3-euw1-ap-pe-df-pch-content-public-u.s3.eu-west-1.amazonaws.com/9780429280092/903cf4ed-cbd9-4ecc-bd90-95916cd1752b/content/inline-math16_2.jpg"/> .
