訂正日: 2006/10/20訂正理由: -訂正箇所: 引用文献情報訂正内容: Wrong : 1) W. Ballmann, M. Gromov and V. Schroeder, Manifolds of nonpositive curvature, Birkhäuser, 1985. 2) A. Basse, Einstein manifolds, Springer, 1987. 3) P. E. Ehrlich, Local convex deformations and sectional curvature, Arch. Math., 26 (1975), 432-435. 4) L. Z. Gao, The construction of negatively Ricci curved manifold, Math. Ann., 271 (1985), 185-208. 5) J. Jost, Nonlinear methods in Riemannian and Kählerian geometry, Birkhäuser, 1988, p. 46.
Right : [1] W. Ballmann, M. Gromov and V. Schroeder, Manifolds of nonpositive curvature, Birkhäuser, 1985. [2] A. Basse, Einstein manifolds, Springer, 1987. [3] P. E. Ehrlich, Local convex deformations and sectional curvature, Arch. Math., 26 (1975), 432-435. [4] L. Z. Gao, The construction of negatively Ricci curved manifold, Math. Ann., 271 (1985), 185-208. [5] J. Jost, Nonlinear methods in Riemannian and Kählerian geometry, Birkhäuser, 1988, p. 46.