“…Since the proof there makes no assumption on the characteristic, formula (20) and Lemmas 2 and 3 are valid for arbitrary F. Also our formula (21) is implied by [2, Lemma 3.2 (i)]. (9) The center of a nonassociative algebra is the set of all elements c in the nucleus for which [x, c]=0 for every x. The center is a characteristic subalgebra, and in the case of a simple alternative algebra is a field.…”