Geometry of a navigation problem: the $\lambda-$Funk Finsler Metrics
DOI:
https://doi.org/10.5902/2179460X88467Keywords:
Navigation problem, λ−Funk metric, Finsler metricAbstract
We investigate the travel time in a navigation problem from a geometric perspective, with respect to a new class of Finsler metrics. We present the λ−Funk Finsler Metrics. The setting involves an open disk centered at the origin, representing a circular lake perturbed by a symmetric wind flow proportional to the distance from the origin with proportionality factor λ. The Randers metric, which is an important Finsler metric, derived from this physical problem, generalizes the well-known Euclidean metric (λ = 0) on the Cartesian plane and the Funk metric on the unit disk (λ = 1). We obtain the formula for distance, or travel
time, from point to point, and the circumference equations. In addition, we obtain the distance formulas from point to line and vice versa.
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Bao, D., Robles, C., & Shen, Z. (2004). Zermelo navigation on Riemannian manifolds. J. Differential Geom., 66(3), 377 – 435. https://projecteuclid.org/journals/journal-of-differential-geometry/volume-66/issue-3/Zermelo-navigation-on-Riemannian-manifolds/10.4310/jdg/1098137838.full. DOI: https://doi.org/10.4310/jdg/1098137838
Cheng, X. & Shen, Z. (2012). Finsler Geometry: An approach via Randers spaces. Science Press Beijing-Springer. DOI: https://doi.org/10.1007/978-3-642-24888-7
Chern, S. S. & Shen, Z. (2005). Riemannian-Finsler geometry. World Scientific. DOI: https://doi.org/10.1142/5263
Ch´avez, N. M. S., Le´on, V. A. M., Sosa, L. G. Q., & Moyses, J. R. (2021). Um problema de navegação de Zermelo: M´etrica de funk. REMAT: Revista Eletrˆonica da Matem´atica, 7(1), e3010. DOI: https://doi.org/10.35819/remat2021v7i1id4574
Ch´avez, N. M. S., Moyses, J. R., & Le´on, V. A. M. (2024). Sobre as par´abolas de funk. REMAT: Revista Eletrˆonica da Matem´atica, 10(1), e3001. DOI: https://doi.org/10.35819/remat2024v10i1id6680
Do Carmo, M. P. (2019). Geometria Riemanniana. (Projeto Euclides, 6th ed). Instituto de Matem´atica Pura e Aplicada (IMPA).
Ebbinghaus, H. D. & Peckhaus, V. (2015). Ernst Zermelo: An approach to His Life and Work. (2nd ed). Springer Berlin, Heidelberg. DOI: https://doi.org/10.1007/978-3-662-47997-1
Funk, P. (1929). Uber Geometrien bei denen die Geraden die Kurzesten sind. Math. Ann.,101, 226 – 237. https://doi.org/10.1007/BF01454835. DOI: https://doi.org/10.1007/BF01454835
Guo, E. & Mo, X. (2018). The geometry of spherically symmetric Finsler manifolds. (SpringerBriefs in Mathematics series). Springer Singapore. DOI: https://doi.org/10.1007/978-981-13-1598-5
Huang, L. & Mo, X. (2013). Projectively flat Finsler metrics with orthogonal invariance. Ann. Polon. Math., 107(3), 259–270. https://www.impan.pl/en/publishing-house/journals-and-series/annales-polonici-mathematici/all/107/3/84641/projectively-flat-finsler-metrics-with-orthogonal-invariance. DOI: https://doi.org/10.4064/ap107-3-3
Randers, G. (1941). On an asymmetrical metric in the four-space of general relativity. DOI: https://doi.org/10.1103/PhysRev.59.195
Phys. Rev., 59, 195–199. https://link.aps.org/doi/10.1103/PhysRev.59.195.
Sadeghi, H. (2021). Funk-type Finsler metrics. J. Finsler Geom. Appl., 2(2), 77–88.
Shen, Z. (2001). Lectures on Finsler Geometry. World Scientific. DOI: https://doi.org/10.1142/9789812811622
Shen, Z. (2003). Finsler metrics with K = 0 and S = 0. Canad. J. Math., 55(1), 112 – 132. https://doi.org/10.4153/CJM-2003-005-6. DOI: https://doi.org/10.4153/CJM-2003-005-6
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