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Transactions of the American Mathematical Society

Published by the American Mathematical Society since 1900, Transactions of the American Mathematical Society is devoted to longer research articles in all areas of pure and applied mathematics.

ISSN 1088-6850 (online) ISSN 0002-9947 (print)

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The support of the equilibrium measure in the presence of a monomial external field on $[-1,1]$
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by S. B. Damelin and A. B. J. Kuijlaars PDF
Trans. Amer. Math. Soc. 351 (1999), 4561-4584 Request permission


The support of the equilibrium measure associated with an external field of the form $Q(x) = - cx^{2m+1}$, $x \in [-1,1]$, with $c > 0$ and $m$ a positive integer is investigated. It is shown that the support consists of at most two intervals. This resolves a question of Deift, Kriecherbauer and McLaughlin.
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Additional Information
  • S. B. Damelin
  • Affiliation: Department of Mathematics, University of the Witwatersrand, PO Wits 2050, South Africa
  • Email:
  • A. B. J. Kuijlaars
  • Affiliation: Department of Mathematics, Katholieke Universiteit Leuven, Celestijnenlaan 200 B, B-3001 Leuven, Belgium
  • MR Author ID: 341696
  • Email:
  • Received by editor(s): June 22, 1997
  • Published electronically: July 21, 1999
  • Additional Notes: The research of the first author was begun while visiting the Mathematics Department at the Katholieke Universiteit Leuven, whose invitation to visit and hospitality are kindly acknowledged. This research was partly financed by FWO research project G.0278.97.
    The second author was supported by a postdoctoral fellowship of the Belgian National Fund for Scientific Research, Scientific Research Network nr WO.011.96N: Fundamental Methods and Techniques in Mathematics
  • © Copyright 1999 American Mathematical Society
  • Journal: Trans. Amer. Math. Soc. 351 (1999), 4561-4584
  • MSC (1991): Primary 31A15; Secondary 41A10, 45E05
  • DOI:
  • MathSciNet review: 1675178