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On the simultaneous determination of zeros of analytic or sectionally analytic functions

Über die gleichzeitige Bestimmung von Nullstellen analytischer oder stückweise analytischer Funktionen

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Abstract

It is shown how the total-step and single-step iterative methods, as well as their improvements, for the simultaneous determination of simple zeros of polynomials can be used (with one slight modification) for the determination of simple zeros of analytic functions (inside or outside a simple smooth closed contour in the complex plane) or sectionally analytic functions (outside their arcs of discontinuity). Numerical results, obtained by the single-step method, are also presented.

Zusammenfassung

Es wird gezeigt, wie die Totalschritt- und Einschritt-Iterations-Verfahren für die gleichzeitige Bestimmung von einfachen Nullstellen von Polynomen sowie ihre Verbesserungen (mit einer kleinen Modifikation) für die Bestimmung von einfachen Nullstellen analytischer Funktionen (im inneren oder äußeren einer einfachen glatten abgeschlossenen Kontur in der komplexen Ebene) oder stückweise analytischer Funktionen (im äußeren ihrer Unstetigkeitsbögen) benutzt werden können. Numerische Ergebnisse, die mit der Einschrittmethode erhalten wurden, werden auch präsentiert.

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References

  1. Anastasselou, E. G., Ioakimidis, N. I.: A generalization of the Siewert-Burniston method for the determination of zeros of analytic functions. J. Math. Phys.25, 2422–2425 (1984).

    Google Scholar 

  2. Burniston, E. E., Siewert, C. E.: The use of Riemann problems in solving a class of transcendental equations. Proc. Cambridge. Philos. Soc.73, 111–118 (1973).

    Google Scholar 

  3. Davis, P. J., Rabinowitz, P.: Methods of Numerical Integration, 1st ed., pp. 134–137. New York: Academic Press 1975.

    Google Scholar 

  4. Delves, L. M., Lyness, J. N.: A numerical method for locating the zeros of an analytic function. Math. Comp.21, 543–560 (1967).

    Google Scholar 

  5. Fornaro, R. J.: Numerical evaluation of integrals around simple closed curves. SIAM J. Numer. Anal.10, 623–634 (1973).

    Google Scholar 

  6. Gakhov, F. D.: Boundary Value Problems, pp. 28–31, 85–96, 420–436. Oxford: Pergamon Press and Addison-Wesley 1966.

    Google Scholar 

  7. Li, T.-Y.: On locating all zeros of an analytic function within a bounded domain by a revised Delves/Lyness method. SIAM J. Numer. Anal.20, 865–871 (1983).

    Google Scholar 

  8. Lyness, J. N., Delves, L. M.: On numerical contour integration round a closed contour. Math. Comp.21, 561–577 (1967).

    Google Scholar 

  9. Milovanović, G. V., Petković, M. S.: On the convergence order of a modified method for simultaneous finding polynomial zeros. Computing30, 171–178 (1983).

    Google Scholar 

  10. Smirnov, V. I.: A Course of Higher Mathematics, Vol. III, Part 2: Complex Variables, Special Functions, pp. 87–92, 256–257. Oxford: Pergamon Press and Addison-Wesley 1964.

    Google Scholar 

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Ioakimidis, N.I., Anastasselou, E.G. On the simultaneous determination of zeros of analytic or sectionally analytic functions. Computing 36, 239–247 (1986). https://doi.org/10.1007/BF02240070

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