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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)

The 2020 MCQ for Transactions of the American Mathematical Society is 1.48.

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On the number of geodesic segments connecting two points on manifolds of non-positive curvature
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by Paul Horja PDF
Trans. Amer. Math. Soc. 349 (1997), 5021-5030 Request permission

Abstract:

We prove that on a complete Riemannian manifold $M$ of dimension $n$ with sectional curvature $K_M < 0$, two points which realize a local maximum for the distance function (considered as a function of two arguments) are connected by at least $2n+1$ geodesic segments. A simpler version of the argument shows that if one of the points is fixed and $K_M \leq 0$ then the two points are connected by at least $n+1$ geodesic segments. The proof uses mainly the convexity properties of the distance function for metrics of negative curvature.
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Additional Information
  • Paul Horja
  • Affiliation: Department of Mathematics, Duke University, Durham, North Carolina 27708-0320
  • Email: horja@math.duke.edu
  • Received by editor(s): October 27, 1995
  • Received by editor(s) in revised form: June 6, 1996
  • © Copyright 1997 American Mathematical Society
  • Journal: Trans. Amer. Math. Soc. 349 (1997), 5021-5030
  • MSC (1991): Primary 53C22; Secondary 53C70
  • DOI: https://doi.org/10.1090/S0002-9947-97-01847-3
  • MathSciNet review: 1401773