Higashimori, Nobuyuki; Fujiwara, Hiroshi Semi-discrete finite difference schemes for the nonlinear Cauchy problems of the normal form. (English) Zbl 1453.65117 Proc. Japan Acad., Ser. A 93, No. 9, 99-104 (2017). MSC: 65J08 35F55 35R25 PDFBibTeX XMLCite \textit{N. Higashimori} and \textit{H. Fujiwara}, Proc. Japan Acad., Ser. A 93, No. 9, 99--104 (2017; Zbl 1453.65117) Full Text: DOI
Iso, Yuusuke Convergence of a semi-discrete finite difference scheme applied to the abstract Cauchy problem on a scale of Banach spaces. (English) Zbl 1236.65060 Proc. Japan Acad., Ser. A 87, No. 7, 109-113 (2011). MSC: 65J08 65J10 47D06 65M06 65J20 65M20 35L45 PDFBibTeX XMLCite \textit{Y. Iso}, Proc. Japan Acad., Ser. A 87, No. 7, 109--113 (2011; Zbl 1236.65060) Full Text: DOI
Dhungana, Bishnu Prasad; Matsuzawa, Tadato An existence result of the Cauchy Dirichlet problem for the Hermite heat equation. (English) Zbl 1189.33015 Proc. Japan Acad., Ser. A 86, No. 2, 45-47 (2010). MSC: 33C45 35K15 PDFBibTeX XMLCite \textit{B. P. Dhungana} and \textit{T. Matsuzawa}, Proc. Japan Acad., Ser. A 86, No. 2, 45--47 (2010; Zbl 1189.33015) Full Text: DOI
Dhungana, Bishnu P. An example of nonuniqueness of the Cauchy problem for the Hermite heat equation. (English) Zbl 1091.35030 Proc. Japan Acad., Ser. A 81, No. 3, 37-39 (2005). MSC: 35K15 35K05 33C45 PDFBibTeX XMLCite \textit{B. P. Dhungana}, Proc. Japan Acad., Ser. A 81, No. 3, 37--39 (2005; Zbl 1091.35030) Full Text: DOI Euclid
Nakaki, Tatsuyuki; Tomoeda, Kenji A finite difference approach to the interface equation for some nonlinear diffusion equations with absorption. (English) Zbl 0985.65101 Proc. Japan Acad., Ser. A 77, No. 2, 32-37 (2001). Reviewer: S.C.Rajvanshi (Chandigarh) MSC: 65M06 35K65 76S05 76M20 PDFBibTeX XMLCite \textit{T. Nakaki} and \textit{K. Tomoeda}, Proc. Japan Acad., Ser. A 77, No. 2, 32--37 (2001; Zbl 0985.65101) Full Text: DOI
Takeuchi, Jiro Solvability of the Cauchy problem for some operators of Schrödinger type. (Résolubilité du problème de Cauchy pour certains opérateurs du type de Schrödinger.) (French) Zbl 0916.35147 Proc. Japan Acad., Ser. A 74, No. 4, 49-52 (1998). Reviewer: André Martinez (Bologna) MSC: 35S10 47G30 PDFBibTeX XMLCite \textit{J. Takeuchi}, Proc. Japan Acad., Ser. A 74, No. 4, 49--52 (1998; Zbl 0916.35147) Full Text: DOI
Nawa, Hayato Limiting profiles of blow-up solutions of the nonlinear Schrödinger equation with critical power nonlinearity. (English) Zbl 0899.35106 Proc. Japan Acad., Ser. A 73, No. 10, 171-175 (1997). MSC: 35Q55 35B40 35J60 PDFBibTeX XMLCite \textit{H. Nawa}, Proc. Japan Acad., Ser. A 73, No. 10, 171--175 (1997; Zbl 0899.35106) Full Text: DOI
Kozono, Hideo; Yamazaki, Masao Small stable stationary solutions in Morrey spaces of the Navier-Stokes equation. (English) Zbl 0853.35088 Proc. Japan Acad., Ser. A 71, No. 9, 199-201 (1995). MSC: 35Q30 35B35 46E35 PDFBibTeX XMLCite \textit{H. Kozono} and \textit{M. Yamazaki}, Proc. Japan Acad., Ser. A 71, No. 9, 199--201 (1995; Zbl 0853.35088) Full Text: DOI
Tateishi, Hiroshi Nonconvex-valued differential inclusions in a separable Hilbert space. (English) Zbl 0789.34019 Proc. Japan Acad., Ser. A 68, No. 9, 296-301 (1992). Reviewer: Nguyêñ Hôǹg Thái (Minsk) MSC: 34A60 35R70 34G20 49J24 PDFBibTeX XMLCite \textit{H. Tateishi}, Proc. Japan Acad., Ser. A 68, No. 9, 296--301 (1992; Zbl 0789.34019) Full Text: DOI
Tsutaya, Kimitoshi Scattering theory for semilinear wave equations with small data in two space dimensions. (English) Zbl 0767.35055 Proc. Japan Acad., Ser. A 68, No. 8, 227-231 (1992). MSC: 35P25 35L05 PDFBibTeX XMLCite \textit{K. Tsutaya}, Proc. Japan Acad., Ser. A 68, No. 8, 227--231 (1992; Zbl 0767.35055) Full Text: DOI
Kobayashi, Yoshikazu; Tanaka, Naoki Evolution governed by ”generalized” dissipative operators. (English) Zbl 0779.34055 Proc. Japan Acad., Ser. A 68, No. 8, 223-226 (1992). Reviewer: G.Di Blasio (Roma) MSC: 34G20 34A60 47H20 PDFBibTeX XMLCite \textit{Y. Kobayashi} and \textit{N. Tanaka}, Proc. Japan Acad., Ser. A 68, No. 8, 223--226 (1992; Zbl 0779.34055) Full Text: DOI
Hayasida, Kazuya An ill-posed estimate for a class of degenerate quasilinear elliptic equations. (English) Zbl 0754.35045 Proc. Japan Acad., Ser. A 67, No. 6, 186-190 (1991). Reviewer: Dang Dinh Ang (Ho Chi Minh City) MSC: 35J70 35R25 35J60 PDFBibTeX XMLCite \textit{K. Hayasida}, Proc. Japan Acad., Ser. A 67, No. 6, 186--190 (1991; Zbl 0754.35045) Full Text: DOI
Kitagawa, Keiichiro On the Duhamel principle. (Sur le principe de Duhamel.) (French) Zbl 0747.35011 Proc. Japan Acad., Ser. A 66, No. 7, 222-225 (1990). Reviewer: S.L.Svensson (Lund) MSC: 35G10 35K25 35B30 PDFBibTeX XMLCite \textit{K. Kitagawa}, Proc. Japan Acad., Ser. A 66, No. 7, 222--225 (1990; Zbl 0747.35011) Full Text: DOI
Miyadera, Isao; Tanaka, Naoki A remark on exponentially bounded C-semigroups. (English) Zbl 0731.47040 Proc. Japan Acad., Ser. A 66, No. 2, 31-34 (1990). Reviewer: B.Burrows (Stafford) MSC: 47B48 47D06 PDFBibTeX XMLCite \textit{I. Miyadera} and \textit{N. Tanaka}, Proc. Japan Acad., Ser. A 66, No. 2, 31--34 (1990; Zbl 0731.47040) Full Text: DOI
Chen, Yun-Gang; Giga, Yoshikazu; Goto, Shun’ichi Uniqueness and existence of viscosity solutions of generalized mean curvature flow equations. (English) Zbl 0735.35082 Proc. Japan Acad., Ser. A 65, No. 7, 207-210 (1989). Reviewer: A.Pryde (Clayton) MSC: 35K65 35B40 35K55 35B05 PDFBibTeX XMLCite \textit{Y.-G. Chen} et al., Proc. Japan Acad., Ser. A 65, No. 7, 207--210 (1989; Zbl 0735.35082) Full Text: DOI
Komatsu, Gen; Nishitani, Tatsuo Continuation of bicharacteristics for effectively hyperbolic operators. (English) Zbl 0702.35008 Proc. Japan Acad., Ser. A 65, No. 4, 109-112 (1989). Reviewer: H.Engler MSC: 35A30 35L25 35S05 PDFBibTeX XMLCite \textit{G. Komatsu} and \textit{T. Nishitani}, Proc. Japan Acad., Ser. A 65, No. 4, 109--112 (1989; Zbl 0702.35008) Full Text: DOI
Bernardi, Enrico; Bove, Antonio The Cauchy problem for a class of hyperbolic operators with triple characteristics. (English) Zbl 0687.35053 Proc. Japan Acad., Ser. A 64, No. 10, 364-366 (1988). Reviewer: A.Tsutsumi MSC: 35L30 35B30 35A07 PDFBibTeX XMLCite \textit{E. Bernardi} and \textit{A. Bove}, Proc. Japan Acad., Ser. A 64, No. 10, 364--366 (1988; Zbl 0687.35053) Full Text: DOI
Asano, Kiyoshi A note on the abstract Cauchy-Kowalewski theorem. (English) Zbl 0666.35003 Proc. Japan Acad., Ser. A 64, No. 4, 102-105 (1988). Reviewer: J.Hainzl MSC: 35A10 34G20 35A35 PDFBibTeX XMLCite \textit{K. Asano}, Proc. Japan Acad., Ser. A 64, No. 4, 102--105 (1988; Zbl 0666.35003) Full Text: DOI
Igari, Katsuju Uniqueness in the characteristic Cauchy problem under a convexity condition. (English) Zbl 0657.35004 Proc. Japan Acad., Ser. A 63, No. 8, 295-297 (1987). Reviewer: K.Igari MSC: 35A05 35A30 PDFBibTeX XMLCite \textit{K. Igari}, Proc. Japan Acad., Ser. A 63, 295--297 (1987; Zbl 0657.35004) Full Text: DOI Euclid
Igari, Katsuju On the Cauchy-Kowalewski theorem for characteristic initial surfaces. (English) Zbl 0627.35002 Proc. Japan Acad., Ser. A 63, 7-9 (1987). Reviewer: J.Jaenicke MSC: 35A10 35G05 PDFBibTeX XMLCite \textit{K. Igari}, Proc. Japan Acad., Ser. A 63, 7--9 (1987; Zbl 0627.35002) Full Text: DOI
Bove, Antonio; Lewis, Jeff E.; Parenti, Cesare; Tahara, Hidetoshi Singularities and Cauchy problem for Fuchsian hyperbolic equations. (English) Zbl 0676.35050 Proc. Japan Acad., Ser. A 62, 80-82 (1986). MSC: 35L30 35A05 35B40 PDFBibTeX XMLCite \textit{A. Bove} et al., Proc. Japan Acad., Ser. A 62, 80--82 (1986; Zbl 0676.35050) Full Text: DOI
Nishioka, Kunio Large time behavior of a solution of a parabolic equation. (English) Zbl 0645.35039 Proc. Japan Acad., Ser. A 62, 371-374 (1986). Reviewer: M.Cinquini-Cibrario MSC: 35K30 35A05 35B40 PDFBibTeX XMLCite \textit{K. Nishioka}, Proc. Japan Acad., Ser. A 62, 371--374 (1986; Zbl 0645.35039) Full Text: DOI
Ichinose, Takashi; Tamura, Hiroshi Path integral for the Weyl quantized relativistic Hamiltonian. (English) Zbl 0597.58038 Proc. Japan Acad., Ser. A 62, 91-93 (1986). Reviewer: Yu.Latushkin MSC: 58J40 PDFBibTeX XMLCite \textit{T. Ichinose} and \textit{H. Tamura}, Proc. Japan Acad., Ser. A 62, 91--93 (1986; Zbl 0597.58038) Full Text: DOI
Kano, Tadayoshi; Nishida, Takaaki Sur l’équation de Boussinesq des ondes de surface de l’eau. (On the Boussinesq equation for water surface waves). (French) Zbl 0601.35004 Proc. Japan Acad., Ser. A 61, 91-94 (1985). Reviewer: T.Petrila MSC: 35A10 35Q99 76B15 PDFBibTeX XMLCite \textit{T. Kano} and \textit{T. Nishida}, Proc. Japan Acad., Ser. A 61, 91--94 (1985; Zbl 0601.35004) Full Text: DOI
Kano, Tadayoshi; Nishida, Takaaki Une justification mathématique pour l’équation de Korteweg-de Vries approchant des ondes longues de surface de l’eau. (French) Zbl 0589.76030 Proc. Japan Acad., Ser. A 61, 345-348 (1985). MSC: 76B15 35Q99 PDFBibTeX XMLCite \textit{T. Kano} and \textit{T. Nishida}, Proc. Japan Acad., Ser. A 61, 345--348 (1985; Zbl 0589.76030) Full Text: DOI
Nishitani, Tatsuo On the Cauchy problem for effectively hyperbolic systems. (English) Zbl 0587.35061 Proc. Japan Acad., Ser. A 61, 125-128 (1985). Reviewer: M.Idemen MSC: 35L45 35S05 35L67 35B65 PDFBibTeX XMLCite \textit{T. Nishitani}, Proc. Japan Acad., Ser. A 61, 125--128 (1985; Zbl 0587.35061) Full Text: DOI
Tahara, Hidetoshi Cauchy problems for Fuchsian hyperbolic equations in spaces of functions of Gevrey classes. (English) Zbl 0586.35060 Proc. Japan Acad., Ser. A 61, 63-65 (1985). Reviewer: P.Jeanquartier MSC: 35L30 35B30 46E35 35A05 58J47 PDFBibTeX XMLCite \textit{H. Tahara}, Proc. Japan Acad., Ser. A 61, 63--65 (1985; Zbl 0586.35060) Full Text: DOI
Itoh, Shigeharu Well-posedness of the Cauchy problem for some weakly hyperbolic operators in Gevrey classes. (English) Zbl 0584.35065 Proc. Japan Acad., Ser. A 61, 66-69 (1985). Reviewer: M.Idemen MSC: 35L30 35R25 35B30 PDFBibTeX XMLCite \textit{S. Itoh}, Proc. Japan Acad., Ser. A 61, 66--69 (1985; Zbl 0584.35065) Full Text: DOI
Morimoto, Yoshinori; Taniguchi, Kazuo Propagation of wave front sets of solutions of the Cauchy problem for a hyperbolic system in Gevrey classes. (English) Zbl 0582.35077 Proc. Japan Acad., Ser. A 61, 27-30 (1985). Reviewer: E.C.Young MSC: 35L55 35B40 35L30 PDFBibTeX XMLCite \textit{Y. Morimoto} and \textit{K. Taniguchi}, Proc. Japan Acad., Ser. A 61, 27--30 (1985; Zbl 0582.35077) Full Text: DOI
Emmanuele, Giovanni On a theorem of R. H. Martin on certain Cauchy problems for ordinary differential equations. (English) Zbl 0578.34003 Proc. Japan Acad., Ser. A 61, 207-210 (1985). MSC: 34A12 PDFBibTeX XMLCite \textit{G. Emmanuele}, Proc. Japan Acad., Ser. A 61, 207--210 (1985; Zbl 0578.34003) Full Text: DOI
Nakane, Shizuo Uniqueness and non-uniqueness in the Cauchy problem for a class of operators of degenerate type. II. (English) Zbl 0577.35067 Proc. Japan Acad., Ser. A 59, 318-320 (1983). MSC: 35L15 35A05 PDFBibTeX XMLCite \textit{S. Nakane}, Proc. Japan Acad., Ser. A 59, 318--320 (1983; Zbl 0577.35067) Full Text: DOI
Nakane, Shizuo Non-uniqueness in the Cauchy problem for partial differential operators with multiple characteristics. II. (English) Zbl 0577.35020 Proc. Japan Acad., Ser. A 59, 361-363 (1983). MSC: 35G10 35A05 PDFBibTeX XMLCite \textit{S. Nakane}, Proc. Japan Acad., Ser. A 59, 361--363 (1983; Zbl 0577.35020) Full Text: DOI
Wakabayashi, Seiichiro Analytic singularities of solutions of the hyperbolic Cauchy problem. (English) Zbl 0552.35052 Proc. Japan Acad., Ser. A 59, 449-452 (1983). Reviewer: N.L.Maria MSC: 35L30 35A20 PDFBibTeX XMLCite \textit{S. Wakabayashi}, Proc. Japan Acad., Ser. A 59, 449--452 (1983; Zbl 0552.35052) Full Text: DOI
Sasaki, Shigeru On nonlinear hyperbolic evolution equations with unilateral conditions dependent on time. (English) Zbl 0546.35044 Proc. Japan Acad., Ser. A 59, 59-62 (1983). Reviewer: S.Aizawa MSC: 35L70 35A05 34G20 PDFBibTeX XMLCite \textit{S. Sasaki}, Proc. Japan Acad., Ser. A 59, 59--62 (1983; Zbl 0546.35044) Full Text: DOI
Wakabayashi, Seiichiro Singularities of solutions of the hyperbolic Cauchy problem in Gevrey classes. (English) Zbl 0527.35048 Proc. Japan Acad., Ser. A 59, 182-185 (1983). MSC: 35L15 35A20 PDFBibTeX XMLCite \textit{S. Wakabayashi}, Proc. Japan Acad., Ser. A 59, 182--185 (1983; Zbl 0527.35048) Full Text: DOI
Nakane, Shizuo Non-uniqueness in the Cauchy problem for partial differential operators with multiple characteristics. (English) Zbl 0527.35005 Proc. Japan Acad., Ser. A 59, 41-43 (1983). MSC: 35A30 35A05 35G05 PDFBibTeX XMLCite \textit{S. Nakane}, Proc. Japan Acad., Ser. A 59, 41--43 (1983; Zbl 0527.35005) Full Text: DOI
Nishitani, Tatsuo Energy inequality for non strictly hyperbolic operators in the Gevrey class. (English) Zbl 0535.35053 Proc. Japan Acad., Ser. A 58, 429-431 (1982). Reviewer: M.-T.Lacroix MSC: 35L30 35B45 PDFBibTeX XMLCite \textit{T. Nishitani}, Proc. Japan Acad., Ser. A 58, 429--431 (1982; Zbl 0535.35053) Full Text: DOI
Yamada, Haruki Sharpness of parametrices for strictly hyperbolic operators. (English) Zbl 0519.35047 Proc. Japan Acad., Ser. A 58, 137-140 (1982). MSC: 35L30 PDFBibTeX XMLCite \textit{H. Yamada}, Proc. Japan Acad., Ser. A 58, 137--140 (1982; Zbl 0519.35047) Full Text: DOI
Nakane, Shizuo Uniqueness and nonuniqueness in the Cauchy problem for a class of operators of degenerate type. (English) Zbl 0519.35012 Proc. Japan Acad., Ser. A 58, 147-149 (1982). MSC: 35F25 35A05 PDFBibTeX XMLCite \textit{S. Nakane}, Proc. Japan Acad., Ser. A 58, 147--149 (1982; Zbl 0519.35012) Full Text: DOI
Ichinose, Takashi Path integral for the Dirac equation in two space-time dimensions. (English) Zbl 0518.28011 Proc. Japan Acad., Ser. A 58, 290-293 (1982). MSC: 81S40 28C20 58D30 PDFBibTeX XMLCite \textit{T. Ichinose}, Proc. Japan Acad., Ser. A 58, 290--293 (1982; Zbl 0518.28011) Full Text: DOI
Watanabe, Michiaki A perturbation theory for abstract evolution equations of second order. (English) Zbl 0505.34040 Proc. Japan Acad., Ser. A 58, 143-146 (1982). MSC: 34D10 34E10 34A12 PDFBibTeX XMLCite \textit{M. Watanabe}, Proc. Japan Acad., Ser. A 58, 143--146 (1982; Zbl 0505.34040) Full Text: DOI
Amano, Kazuo Branching of singularities for degenerate hyperbolic operators and Stokes phenomena. (English) Zbl 0471.35003 Proc. Japan Acad., Ser. A 56, 206-209 (1980). MSC: 35A20 35A22 35L80 PDFBibTeX XMLCite \textit{K. Amano}, Proc. Japan Acad., Ser. A 56, 206--209 (1980; Zbl 0471.35003) Full Text: DOI
Ouchi, Sunao Characteristic Cauchy problems and solutions of formal power series. (English) Zbl 0467.35001 Proc. Japan Acad., Ser. A 56, 372-375 (1980). MSC: 35A10 35C10 30E25 35C20 PDFBibTeX XMLCite \textit{S. Ouchi}, Proc. Japan Acad., Ser. A 56, 372--375 (1980; Zbl 0467.35001) Full Text: DOI
Nishiwada, Kimimasa Explicit formulae for solutions of Schrödinger equations with quadratic Hamiltonians. (English) Zbl 0465.35023 Proc. Japan Acad., Ser. A 56, 362-366 (1980). MSC: 35J10 35A08 81Q05 PDFBibTeX XMLCite \textit{K. Nishiwada}, Proc. Japan Acad., Ser. A 56, 362--366 (1980; Zbl 0465.35023) Full Text: DOI
Igari, Katsuju Cauchy problem for hyperbolic differential operators with double characteristic roots. (English) Zbl 0463.35021 Proc. Japan Acad., Ser. A 56, 67-69 (1980). MSC: 35G10 35L99 35A30 35R25 35L15 PDFBibTeX XMLCite \textit{K. Igari}, Proc. Japan Acad., Ser. A 56, 67--69 (1980; Zbl 0463.35021) Full Text: DOI
Ishii, Tan On a representation of the solution of the Cauchy problem with singular initial data. (English) Zbl 0454.35024 Proc. Japan Acad., Ser. A 56, 59-61 (1980). MSC: 35C99 35A30 PDFBibTeX XMLCite \textit{T. Ishii}, Proc. Japan Acad., Ser. A 56, 59--61 (1980; Zbl 0454.35024) Full Text: DOI
Miyake, Masatake A remark on the inverse theorem of Cauchy-Kovalevskaya. (English) Zbl 0446.35003 Proc. Japan Acad., Ser. A 56, 55-58 (1980). MSC: 35A10 PDFBibTeX XMLCite \textit{M. Miyake}, Proc. Japan Acad., Ser. A 56, 55--58 (1980; Zbl 0446.35003) Full Text: DOI
Hayashi, Yoshio; Hurd, R. A. On a certain integral equation of Fredholm of the first kind and a related singular integral equation. (English) Zbl 0444.45003 Proc. Japan Acad., Ser. A 56, 22-27 (1980). MSC: 45B05 45E05 45H05 PDFBibTeX XMLCite \textit{Y. Hayashi} and \textit{R. A. Hurd}, Proc. Japan Acad., Ser. A 56, 22--27 (1980; Zbl 0444.45003) Full Text: DOI
Iwasaki, Chisato; Iwasaki, Nobuhisa Parametrix for a degenerate parabolic equation. (English) Zbl 0448.35054 Proc. Japan Acad., Ser. A 55, 237-240 (1979). MSC: 35K65 35P20 35S10 58J35 PDFBibTeX XMLCite \textit{C. Iwasaki} and \textit{N. Iwasaki}, Proc. Japan Acad., Ser. A 55, 237--240 (1979; Zbl 0448.35054) Full Text: DOI
Okamoto, Shuichi A difference approach to Mikusinski’s operational calculus. (English) Zbl 0443.44008 Proc. Japan Acad., Ser. A 54, 303-308 (1978). MSC: 44A40 34A25 39A10 PDFBibTeX XMLCite \textit{S. Okamoto}, Proc. Japan Acad., Ser. A 54, 303--308 (1978; Zbl 0443.44008) Full Text: DOI
Tsuno, Yoshimichi Holomorphic continuation of solutions of degenerate partial differential equations in two variables. (English) Zbl 0406.35004 Proc. Japan Acad., Ser. A 54, 226-229 (1978). MSC: 35B60 35R20 35A10 PDFBibTeX XMLCite \textit{Y. Tsuno}, Proc. Japan Acad., Ser. A 54, 226--229 (1978; Zbl 0406.35004) Full Text: DOI
Tahara, Hidetoshi Cauchy problems for Fuchsian hyperbolic partial differential equations. (English) Zbl 0403.35062 Proc. Japan Acad., Ser. A 54, 92-96 (1978). MSC: 35L30 35A10 35L80 PDFBibTeX XMLCite \textit{H. Tahara}, Proc. Japan Acad., Ser. A 54, 92--96 (1978; Zbl 0403.35062) Full Text: DOI
Nishitani, Tatsuo On the Lax-Mizohata theorem in the analytic and Gevrey classes. (English) Zbl 0442.35025 Proc. Japan Acad., Ser. A 53, 88-90 (1977). MSC: 35G10 35A99 35L30 35S10 PDFBibTeX XMLCite \textit{T. Nishitani}, Proc. Japan Acad., Ser. A 53, 88--90 (1977; Zbl 0442.35025) Full Text: DOI
Kitagawa, Keiichiro; Sadamatsu, Takashi Sur une condition suffisante pour que le problème de Cauchy faiblement hyperbolique soit bien pose. (French) Zbl 0392.35038 Proc. Japan Acad., Ser. A 53, 167-170 (1977). MSC: 35L15 35B45 PDFBibTeX XMLCite \textit{K. Kitagawa} and \textit{T. Sadamatsu}, Proc. Japan Acad., Ser. A 53, 167--170 (1977; Zbl 0392.35038) Full Text: DOI