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) L. Hörmander, Hypoelliptic second order differential equations, Acta Math., 119 (1967), 147-171. 2) K. Taniguchi, The generalized form of Poincaré's inequality and its application to hypoellipticity, Proc. Japan Acad., 50 (1974), 706-711. 3) K. Taniguchi, On the hypoellipticity of the operator a(X, Dx)+g(X)b(X, Y, Dy), Math. Japonicae, 20 (1976), 301-320.
Right : [1] L. Hörmander, Hypoelliptic second order differential equations, Acta Math., 119 (1967), 147-171. [2] K. Taniguchi, The generalized form of Poincaré's inequality and its application to hypoellipticity, Proc. Japan Acad., 50 (1974), 706-711. [3] K. Taniguchi, On the hypoellipticity of the operator a(X, Dx)+g(X)b(X, Y, Dy), Math. Japonicae, 20 (1976), 301-320.