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Proceedings of the American Mathematical Society

Published by the American Mathematical Society since 1950, Proceedings of the American Mathematical Society is devoted to shorter research articles in all areas of pure and applied mathematics.

ISSN 1088-6826 (online) ISSN 0002-9939 (print)

The 2020 MCQ for Proceedings of the American Mathematical Society is 0.85.

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Conformal mappings and the distortion of moduli of rectangles
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by Bruce Palka PDF
Proc. Amer. Math. Soc. 50 (1975), 155-161 Request permission

Abstract:

In this paper it is shown that for an orientation-preserving homeomorphism $f$ between domains $D$ and $D’$ in ${\mathbf {\bar C}}$ to be conformal it is necessary and sufficient that there is an $a > 1$ such that $\bmod f(Q) = \bmod Q$ for each square $Q$ in $D$ and for each oriented rectangle $Q$ in $D$ with $\bmod Q = a$.
References
  • Cabiria Andreian Cazacu, Sur les inégalités de Rengel et la définition géométrique des représentations quasi-conformes, Rev. Roumaine Math. Pures Appl. 9 (1964), 141–155 (French). MR 180673
  • F. W. Gehring, The definitions and exceptional sets for quasiconformal mappings, Ann. Acad. Sci. Fenn. Ser. A I No. 281 (1960), 28. MR 0124488
  • F. W. Gehring and Jussi Väisälä, On the geometric defintion for quasiconformal mappings, Comment. Math. Helv. 36 (1961), 19–32. MR 140684, DOI 10.1007/BF02566889
  • J. A. Kelingos, Contributions to the theory of quasiconformal mappings, Thesis, University of Michigan, Ann Arbor, Mich., 1963.
  • O. Lehto and K. I. Virtanen, Quasikonforme Abbildungen, Die Grundlehren der mathematischen Wissenschaften in Einzeldarstellungen mit besonderer Berücksichtigung der Anwendungsgebiete, Band 126, Springer-Verlag, Berlin-New York, 1965 (German). MR 0188434
  • O. Teichmüller, Untersuchungen über konforme und quasikonforme Abbildung, Deutsche Math. 3 (1938), 621-678.
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Additional Information
  • © Copyright 1975 American Mathematical Society
  • Journal: Proc. Amer. Math. Soc. 50 (1975), 155-161
  • MSC: Primary 30A60
  • DOI: https://doi.org/10.1090/S0002-9939-1975-0369693-7
  • MathSciNet review: 0369693