訂正日: 2006/09/29訂正理由: -訂正箇所: 引用文献情報訂正内容: Right : [1] K. O. Friedrichs, Pseudo-differential operators, Lecture Notes, New York Univ., Courant Inst. Math. Sci., 1968. [2] L. Hörmander, Pseudo-differential operators and hypoelliptic equations, Proc. Symposium on Singular Integrals, Amer. Math. Soc., 10 (1968), 138-183. [3] T. Kato, A generalization of the Heinz inequality, Proc. Japan Acad., 37 (1961), 305-308. [4] H. Kumano-go, On a definition of singular integral operators. I, II, Proc. Japan Acad., 40 (1964), 368-378. [5] H. Kumano-go, Pseudo-differential operators and the uniqueness of the Cauchy problem, Comm. Pure Appl. Math., 22 (1969), 73-129. [6] J. J. Kohn and L. Nirenberg, An algebra of pseudo-differential operators, Comm. Pure Appl. Math., 18 (1965), 269-305. [7] P. D. Lax and L. Nirenberg, On stability for difference schemes; a sharp form of Gårding's inequality, Comm. Pure Appl. Math., 19 (1966), 473-492. [8] L. Nirenberg, Pseudo-differential operators, Berkeley Symposium on Global Analysis, 1968.