Published: 1993 Received: December 02, 1991Available on J-STAGE: October 20, 2006Accepted: -
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Date of correction: October 20, 2006Reason for correction: -Correction: CITATIONDetails: Wrong : 1) M. S. Baouendi and C. Goulaouic, Cauchy problems with characteristic initial hypersurface, Comm. Pure Appl. Math., 26 (1973), 455-475. 2) M. S. Baouendi and C. Goulaouic, Cauchy problems with multiple characteristics in spaces of regular distributions, Russian Math. Surveys, 29 (1974), 72-78. 3) J. Elschner, Singular Ordinary Differential Operators and Pseudodifferential Equations, Lecture Notes in Math., 1128, Springer-Verlag, 1985. 4) Y. Hasegawa, On the initial value problems with data on a double characteristic, J. Math. Kyoto Univ., 11 (1971), 357-372. 5) A. N. Kuznetsov, Differentiable solutions to degenerate systems of ordinary equations, Funct. Anal. Appl., 6 (1972), 119-127. 6) Y. Laurent, Calcul d'indices et irrégularité pour les systèmes holonomes, Astérisque, 130, Soc. Math. France, 1985, pp. 352-364. 7) B. Malgrange, Sur la réduction formelle des équations différentielles à singularités irrégulières, Notas multigraphiées, Grenoble, 1979. 8) T. Mandai, Existence and non-existence of null-solutions for some non-Fuchsian partial differential operators with t-dependent coefficients, Nagoya Math. J., 122 (1991), 115-137. 9) T. Mandai, Existence of C∞ null-solutions and behavior of bicharacteristic curves for differential operators with C∞ coefficients, Japan. J. Math., 15 (1989), 53-63. 10) T. Mandai, A necessary and sufficient condition for the well-posedness of some weakly hyperbolic Cauchy problems, Comm. Partial Differential Equations, 8 (1983), 735-771. 11) M. Miyake, Newton polygons and formal Gevrey indices in the Cauchy-Goursat- Fuchs type equations, J. Math. Soc. Japan, 43 (1991), 305-330. 12) S. Ouchi, Existence of singular solutions and null solutions for linear partial differential operators, J. Fac. Sri. Univ. Tokyo Sect. IA Math., 32 (1985), 457-498. 13) A. Yonemura, Newton polygons and formal Gevrey classes, Publ. Res. Inst. Math. Sci., Kyoto Univ., 26 (1990), 197-204.
Right : [1] M. S. Baouendi and C. Goulaouic, Cauchy problems with characteristic initial hypersurface, Comm. Pure Appl. Math., 26 (1973), 455-475. [2] M. S. Baouendi and C. Goulaouic, Cauchy problems with multiple characteristics in spaces of regular distributions, Russian Math. Surveys, 29 (1974), 72-78. [3] J. Elschner, Singular Ordinary Differential Operators and Pseudodifferential Equations, Lecture Notes in Math., 1128, Springer-Verlag, 1985. [4] Y. Hasegawa, On the initial value problems with data on a double characteristic, J. Math. Kyoto Univ., 11 (1971), 357-372. [5] A. N. Kuznetsov, Differentiable solutions to degenerate systems of ordinary equations, Funct. Anal. Appl., 6 (1972), 119-127. [6] Y. Laurent, Calcul d'indices et irrégularité pour les systèmes holonomes, Astérisque, 130, Soc. Math. France, 1985, pp. 352-364. [7] B. Malgrange, Sur la réduction formelle des équations différentielles à singularités irrégulières, Notas multigraphiées, Grenoble, 1979. [8] T. Mandai, Existence and non-existence of null-solutions for some non-Fuchsian partial differential operators with t-dependent coefficients, Nagoya Math. J., 122 (1991), 115-137. [9] T. Mandai, Existence of C∞ null-solutions and behavior of bicharacteristic curves for differential operators with C∞ coefficients, Japan. J. Math., 15 (1989), 53-63. [10] T. Mandai, A necessary and sufficient condition for the well-posedness of some weakly hyperbolic Cauchy problems, Comm. Partial Differential Equations, 8 (1983), 735-771. [11] M. Miyake, Newton polygons and formal Gevrey indices in the Cauchy-Goursat-Fuchs type equations, J. Math. Soc. Japan, 43 (1991), 305-330. [12] S. Ouchi, Existence of singular solutions and null solutions for linear partial differential operators, J. Fac. Sci. Univ. Tokyo Sect. IA Math., 32 (1985), 457-498. [13] A. Yonemura, Newton polygons and formal Gevrey classes, Publ. Res. Inst. Math. Sci., Kyoto Univ., 26 (1990), 197-204.
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