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A minimizing property of hyperbolic Keplerian orbits

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Abstract

In this short note, we characterize hyperbolic Keplerian orbits as minimizing paths of the Keplerian action functional in the space of curves from a ray emanating from the attractive focus to a point in space. Variants of this result have been previously proved by different methods. Our proof based on hyperbolic anomaly is simple and informative.

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Acknowledgments

I feel privileged and honored to be invited to contribute in this special volume in honor of Professor Paul Rabinowitz. 16 years ago, on 2000/05/28 to be exact, I delivered a contributed talk on my analytic proof for the existence of figure-8 orbit [5] at University of Wisconsin, during the “Madison Conference on Nonlinear Analysis” in honor of Paul. That was the debut of my academic career. Ever since, I have kept working on variational methods for the n-body problem and have received continuous support and encouragements from Paul. I became regular participant for related conferences and workshops, such as the conference series in Nankai, and was invited by Paul to deliver lectures multiple times at Postech. I sincerely thank him for the his generous help and recognition, which were particularly important at the beginning stage of my career. I also thank Yiming Long for his invitation, and Guowei Yu for showing me related results. This work is supported in parts by the Ministry of Science and Technology (Grant NSC 102-2628-M-007-004-MY4) in Taiwan.

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Chen, KC. A minimizing property of hyperbolic Keplerian orbits. J. Fixed Point Theory Appl. 19, 281–287 (2017). https://doi.org/10.1007/s11784-016-0353-5

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