Abstract
We give an elementary proof to the inequality estimating some characteristic of a curve, the visibility angle of the curve from a given point, through the integral curvature of the curve. We consider the case of curves in a metric space of nonpositive curvature in the sense of Alexandrov.
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Alexandrov A. D. and Reshetnyak Yu. G., “Turn of a curve in n-dimensional Euclidean space,” Sibirsk. Mat. Zh., 29, No. 1, 3–23 (1988).
Alexandrov A. D. and Reshetnyak Yu. G., General Theory of Irregular Curves, Kluwer Academic Publishers, New York (1989).
Alexander S. B. and Bishop R., “The Fary-Milnor theorem in Hadamard manifolds,” Proc. Amer. Math. Soc., 126, 3427–3436 (1998).
Bishop R. L., The Total Curvature of a Riemannian Curve [Preprint], Urbana-Shampaign Univ. (2002).
Radon J., “Über Randwertaufgaben beim logarithmischen Potential,” Sitzber, Akad. Wiss. Wien, 128, 1123–1167 (1919).
Reshetnyak Yu. G., “Study of manifolds of bounded curvature by means of isothermal coordinates,” Izv. Sibirsk. Otdel. Akad. Nauk SSSR, 10, No. 1, 15–28 (1959).
Reshetnyak Yu. G., “Isothermal coordinates on manifolds of bounded curvature. I,” Sibirsk. Mat. Zh., 1, No. 1, 88–116 (1960).
Reshetnyak Yu. G., “Isothermal coordinates on manifolds of bounded curvature. II,” Sibirsk. Mat. Zh., 1, No. 2, 248–276 (1960).
Khovanski A. G. and Yakovenko S. Yu., “Generalized Rolle theorem in ℝn and ℂ, ” J. Dynam. Control Systems, 2, No. 1, 101–123 (1996).
Alexandrov A. D., “On a generalization of Riemannian geometry,” Jahresber. Humb. Univ., Berlin, 1955, pp. 3–65. (See also Alexandrov A. D. Selected Works. Part 1, Gordon and Breach Publ., Amsterdam, 1996, pp. 187–249.)
Ballmann W., Lectures on Spaces of Nonpositive Curvature, Birkhäuser, Basel (1995).
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Reshetnyak, Y.G. Estimation of the Visibility Angle of a Curve in a Metric Space of Nonpositive Curvature. Siberian Mathematical Journal 43, 562–567 (2002). https://doi.org/10.1023/A:1015428005694
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DOI: https://doi.org/10.1023/A:1015428005694