Absolute valued real algebras (Q2647303)

Added: In ``A note of correction'', Bull. Am. Math. Soc. 55, 1191 (1949), the author remarks that the existence of a two-dimensional absolute-valued real algebra without unity quantity draws attention to an error of omission in theorem 3 of this paper. This error induces a corresponding one in theorem 3 of the paper reviewed above. None of the author's results on algebras with unity quantity are affected by this omission.