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] J. M. Bony and P. Schapira, Solutions hyperfonctions du problème de Cauchy, Lecture Notes in Math., 287, Springer, 1973, pp. 82-98. [2] -, Propagation des singularités analytiques pour les solutions des équations aux dérivées partielles, Ann. Inst. Fourier, 26 (1976), 81-140. [3] M. D. Bronstein, The Cauchy problem for hyperbolic operators with characteristics of variable multiplicity, Trudy Moskov. Mat. Obšc., 41 (1980), 83-99. (Englishtransl.) Trans. Moscow Math. Soc., 41 (1982). [4] M. Kashiwara and T. Kawai, Microhyperbolic pseudodifferential operators I, J.Math. Soc. Japan, 27 (1975), 359-404. [5] M. Kashiwara and P. Schapira, Microhyperbolic systems, Acta Math., 142 (1979), 1-55. [6] K. Kataoka, Oral communication, June, 1986. [7] H. Komatsu, A local version of Bochner's tube theorem, J. Fac. Sci. Univ. Tokyo, Sect. IA, 19 (1972), 201-214. [8] -, Ultradistributions I, J. Fac. Sci. Univ. Tokyo, Sect. IA, 20 (1973), 25-105. [9] J. M. Trepreau, Le problème de Cauchy hyperbolique dans les classes d'ultrafonctions et d'ultradistributions, Comm. Part. Diff. Eq., 4 (1979), 339-387. [10] S. Wakabayashi, Singularities of solutions of the Cauchy problem for hyperbolicsystems in Gevrey classes, Japanese J. Math., 11 (1985), 157-201. [11] K. Kajitani and S. Wakabayashi, Microhyperbolic operators in Gevrey classes, to appear.