In coding theory, a standard array (or Slepian array) is a q n − k {\displaystyle q^{n-k}} by q k {\displaystyle q^{k}} array that lists all elements of a particular F q n {\displaystyle \mathbb {F} _{q}^{n}} vector space. Standard arrays are used to decode linear codes; i.e. to find the corresponding codeword for any received vector.