“…Let H ( , ) be the generalized quaternion algebra over an arbitrary field K, ie, the algebra of the elements of the form a = a 1 • 1 + a 2 e 2 + a 3 e 3 + a 4 e 4 , where a i ∈ K, i ∈ {1, 2, 3, 4}, and the elements of the basis {1, e 2 , e 3 , e 4 } satisfying the following rules, given in the below multiplication table: and the trace of the element a is t(a) = a +ā. If, for x ∈ H ( , ), the relation n(x) = 0 implies x = 0, then the algebra H ( , ) is called a division algebra, otherwise the quaternion algebra is called a split algebra, (see Flaut and Savin 16 ).…”