Hostname: page-component-cd9895bd7-lnqnp Total loading time: 0 Render date: 2024-12-27T22:14:58.186Z Has data issue: false hasContentIssue false

On the Canonical Solution of the Sturm–Liouville Problem with Singularity and Turning Point of Even Order

Published online by Cambridge University Press:  20 November 2018

A. Neamaty
Affiliation:
Department of Mathematics, University of Mazandaran, Babolsar, Iran e-mail: [email protected]@umz.ac.ir
S. Mosazadeh
Affiliation:
Department of Mathematics, University of Mazandaran, Babolsar, Iran e-mail: [email protected]@umz.ac.ir
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

In this paper, we are going to investigate the canonical property of solutions of systems of differential equations having a singularity and turning point of even order. First, by a replacement, we transform the system to the Sturm–Liouville equation with turning point. Using of the asymptotic estimates provided by Eberhard, Freiling, and Schneider for a special fundamental system of solutions of the Sturm–Liouville equation, we study the infinite product representation of solutions of the systems. Then we transform the Sturm–Liouville equation with turning point to the equation with singularity, then we study the asymptotic behavior of its solutions. Such representations are relevant to the inverse spectral problem.

Type
Research Article
Copyright
Copyright © Canadian Mathematical Society 2011

References

[1] Abramowitz, M. and Stegun, J. A., Handbook of mathematical functions with formalas, graphs, and mathematical tables. National Bureau of Standards Applied Mathematics Series, 55, United States Department of Commerce, Washington, DC, 1964.Google Scholar
[2] Conway, J. B., Functions of one complex variable. II. Graduate Texts in Mathematics, 159, Springer-Verlag, New York, 1995.Google Scholar
[3] Eberhard, W., Freiling, G., and Schneider, A., Connection formulas for second order differential equations with a complex parameter and having an arbitrary number of turning points. Math. Nachr. 165(1994), 205229. doi:10.1002/mana.19941650114Google Scholar
[4] Eberhard, W., Freiling, G., and Wilcken-Stoeber, K., Indefinite eigenvalue problems with several singular points and turning points. Math. Nachr. 229(2001), 5171. doi:10.1002/1522-2616(200109)229:1h51::AID-MANA51i3.0.CO;2-4Google Scholar
[5] Freiling, G. and Yurko, V., On constructing differential equations with singularities from incomplete spectral information. Inverse Problems 14(1998), no. 5, 11311150. doi:10.1088/0266-5611/14/5/004Google Scholar
[6] Freiling, G. and Yurko, V., On the determination of differential equations with singularities and turning points. Results Math. 41(2002), no. 3–4, 275290.Google Scholar
[7] Halvorsen, S. G., A function-theoretic property of solutions of the equation x″ + w – q)x = 0 . Quart. J. Math. Oxford Ser, 38(1987), no. 149, 7376. doi:10.1093/qmath/38.1.73Google Scholar
[8] Akbarfam, A. Jodayree and Mingarelli, A. B., The canonical product of the solution of the Sturm-Liouville equation in one turning point case. Canad. Appl. Math. Quart. 8(2000), no. 4, 305320. doi:10.1216/camq/1032375138Google Scholar
[9] Akbarfam, A. Jodayree and Mingarelli, A. B., Duality for an indefinite inverse Sturm-Liouville problem. J. Math. Anal. Appl. 312(2005), no. 2, 435463. doi:10.1016/j.jmaa.2005.03.096Google Scholar
[10] Kazarinoff, N. D., Asymptotic theory of second order differential equations with two simple turning points. Arch. Rational Mech. Anal. 2(1958), 129150. doi:10.1007/BF00277924Google Scholar
[11] Kheiri, H. and Akbarfam, A. Jodayree, On the infinite product representation of solution and dual equations of Sturm-Liouville equation with turning point of order 4m+1. Bull. Iranian Math. Soc. 29(2003), no. 2, 3550, 91.Google Scholar
[12] Langer, R. E., On the asymptotic solutions of ordinary differential equations, with an application to the Bessel functions of large order. Trans. Amer. Math. Soc. 33(1931), no. 1, 2364.Google Scholar
[13] Levin, B. Ja., Distribution of zeros of entire functions. American Mathematical Society, Providence, RI, 1964.Google Scholar
[14] Litvinenko, O. N. and Soshnikov, V. I., The theory of heterogeneous lines and their applications in radio engineering. (Russian) Radio, Moscow, 1964.Google Scholar
[15] Marasi, H. R. and Akbarfam, A. Jodayree, On the canonical solution of indefinite problem with m turning points of even order. J. Math. Anal. Appl. 332(2007), no. 2, 10711086. doi:10.1016/j.jmaa.2006.10.049Google Scholar
[16] Meshanov, V. P. and Feldstein, A. L., Automatic design of directional couplers. (Russian) Sviza, Moscow, 1980.Google Scholar
[17] Neamaty, A., The canonical product of the solution of the Sturm-Liouville problems. Iranian J. Sci. Tech. 23(1999), no. 2, Trans. A Sci., 141146.Google Scholar
[18] Neamaty, A., Dabbaghian, A., and Mosazadeh, S., Eigenvalues of differential equations with singularities and turning points. Int. J. Contemp. Math. Sci. 3(2008), no. 1–4, 95102.Google Scholar
[19] Olver, F. W. J., Second-order linear differential equation with two turning points. Philos. Trans. R. Soc. Lond. Ser. A 278(1975), 137174. doi:10.1098/rsta.1975.0023Google Scholar
[20] Sveshnikov, A. G. and Il’inskii, A. S., Design problems in electrodynamics. Dokl. Akad. Nauk SSSR. 204(1972), 10771080.Google Scholar
[21] Yurko, V. A., Inverse problem for differential equations with a singularity. (Russian) Differentsial’nye Uravneniya 28(1992), no. 8, 13551362; English translation in Differential Equations 28(1992), no. 8, 1100–1107.Google Scholar