訂正日: 2006/10/20訂正理由: -訂正箇所: 引用文献情報訂正内容: Right : [1] Bang-yen Chen, Geometry of Submanifolds, Marcel Dekker, Inc., 1975. [2] J. A. Schouten, Ricci-Calculus, Springer-Verlag, 1954. [3] K. Yano, Sur la théorie des déformations infinitésimales, J. Fac. Sci. Univ. Tokyo, 6 (1949), 1-75. [4] K. Yano, Integral formulas in Riemannian geometry, Marcel Dekker, Inc., 1970. [5] K. Yano, Infinitesimal variations of submanifolds, Kodai Math. J., 1 (1978), 30-44.