Advanced Studies in Pure Mathematics
- Adv. Stud. Pure Math.
- Singularities in Generic Geometry, S. Izumiya, G. Ishikawa, M. Yamamoto, K. Saji, T. Yamamoto and M. Takahashi, eds. (Tokyo: Mathematical Society of Japan, 2018), 313 - 330
Evolutes of curves in the Lorentz-Minkowski plane
We can use a moving frame, as in the case of regular plane curves in the Euclidean plane, in order to define the arc-length parameter and the Frenet formula for non-lightlike regular curves in the Lorentz-Minkowski plane. This leads naturally to a well defined evolute associated to non-lightlike regular curves without inflection points in the Lorentz-Minkowski plane. However, at a lightlike point the curve shifts between a spacelike and a timelike region and the evolute cannot be defined by using this moving frame. In this paper, we introduce an alternative frame, the lightcone frame, that will allow us to associate an evolute to regular curves without inflection points in the Lorentz-Minkowski plane. Moreover, under appropriate conditions, we shall also be able to obtain globally defined evolutes of regular curves with inflection points. We investigate here the geometric properties of the evolute at lightlike points and inflection points.
Received: 26 March 2016
Revised: 29 June 2016
First available in Project Euclid: 4 October 2018
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Digital Object Identifier
Mathematical Reviews number (MathSciNet)
Zentralblatt MATH identifier
Primary: 53A35: Non-Euclidean differential geometry
Secondary: 53D35: Global theory of symplectic and contact manifolds [See also 57Rxx] 53C50: Lorentz manifolds, manifolds with indefinite metrics
Izumiya, S.; Fuster, M. C. Romero; Takahashi, M. Evolutes of curves in the Lorentz-Minkowski plane. Singularities in Generic Geometry, 313--330, Mathematical Society of Japan, Tokyo, Japan, 2018. doi:10.2969/aspm/07810313. https://projecteuclid.org/euclid.aspm/1538618979