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  3. The Schwarz Function and its Applications
  • Cited by 228
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    • Publisher:
      Mathematical Association of America
      Publication date:
      05 June 2014
      01 June 1974
      ISBN:
      9781614440178
      9780883850176
      9780883850466
      DOI:
      https://doi.org/10.5948/9781614440178
      Dimensions:
      Weight & Pages:
      00kg,
      Dimensions:
      Weight & Pages:
      00kg,
      • Subjects:
      Mathematics, Abstract Analysis
      Series:
      Carus Mathematical Monographs
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    Subjects:
    Mathematics, Abstract Analysis
    Series:
    Carus Mathematical Monographs
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    Book description

    H. A. Schwarz showed us how to extend the notion of reflection in straight lines and circles to reflection in an arbitrary analytic arc. Notable applications were made to the symmetry principle and to problems of analytic continuation. Reflection, in the hands of Schwarz, is an antianalytic mapping. By taking its complex conjugate, we arrive at an analytic function that we have called here the Schwarz Function of the analytic arc. This function is worthy of study in its own right and this essay presents such a study. In dealing with certain familiar topics, the use of the Schwarz Function lends a point of view, a clarity and elegance, and a degree of generality which might otherwise be missing. It opens up a line of inquiry which has yielded numerous interesting things in complex variables; it illuminates some functional equations and a variety of iterations which interest the numerical analyst. The perceptive reader will certainly find here some old wine in relabelled bottles. But one of the principles of mathematical growth is that the relabelling process often suggests a new generation of problems. Means become ends; the medium rapidly becomes the message. This book is not wholly self-contained. Readers will find that they should be familiar with the elementary portions of linear algebra and of the theory of functions of a complex variable.

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