Now, λ-1 = 1 and the product rule in terms of the α's is αα = α, where = + -1 (mod -1). The Latin squares are constructed as follows, the ()th entry in Latin square L (with ≠ 0) is L() = α + αα, where all the operations occur in GF(). In the case that the field is a prime field ( = a prime), where the field elements are represented in the usual way, as the integers modulo , the naming convention above can be dropped and the construction rule can be simplified to L() = + , where ≠ 0 and , and are elements of GF() and all operations are in GF(). The MOLS(4) and MOLS(5) examples above arose from this construction, although with a change of alphabet.