訂正日: 2006/08/29訂正理由: -訂正箇所: 引用文献情報訂正内容: Wrong : 1) M. Bôcher: Introduction to higher algebra. Macmillan, New York, 1907, p. 244. 2) T. Y. Thomas: Riemann spaces of class one and their algebraic characterization, Acta Math., 67 (1936), pp. 169-211, §6. 3) C. B. Allendoerfer: Einstein spaces of class one, Bull. Amer. Math. Soc., 43 (1937), pp. 265-270. 4) J. A. Schouten and D. J. Struik: On some properties of general manifolds relating to Einstein's theory of gravitation, Amer. Jour. Math., 43 (1921), pp. 213-216. 5) M. Matsumoto: Conformally flat Riemann spaces of class one, Jour. Math. Soc. Japan, 3 (1951), pp. 306-309. See (1.4) and Lemma.
Right : [1] M. Bôcher: Introduction to higher algebra. Macmillan, New York, 1907, p. 244. [2] T. Y. Thomas: Riemann spaces of class one and their algebraic characterization, Acta Math., 67 (1936), pp. 169-211, §6. [3] C. B. Allendoerfer: Einstein spaces of class one, Bull. Amer. Math. Soc., 43 (1937), pp. 265-270. [4] J. A. Schouten and D. J. Struik: On some properties of general manifolds relating to Einstein's theory of gravitation, Amer. Jour. Math., 43 (1921), pp. 213-216. [5] M. Matsumoto: Conformally flat Riemann spaces of class one, Jour. Math. Soc. Japan, 3 (1951), pp. 306-309. See (1.4) and Lemma.
