Generalized Antiorthotomics of (n, m)-Cusp Curves

Qiming Zhao, Yuxin Liu, Lili Wang and Yuan Chang ()
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Qiming Zhao: School of Mathematics, Jilin University of Finance and Economics, Changchun 130117, China
Yuxin Liu: School of General Education, Shenyang City University, Shenyang 110112, China
Lili Wang: School of Science, Dalian Maritime University, Dalian 116026, China
Yuan Chang: School of Mathematics, Dongbei University of Finance and Economics, Dalian 116025, China

Mathematics, 2025, vol. 13, issue 16, 1-20

Abstract: In optics, light rays emitted from a light source form a wavefront (orthotomic) upon reflection by a mirror. The mirror is referred to as an antiorthotomic of the orthotomic. The investigation of the relationship between orthotomics and antiorthotomics constitutes an interesting problem in physics. However, the study becomes ambiguous when the orthotomic exhibits singular points. In this paper, we define generalized antiorthotomics of (n, m)-cusp curves in the Euclidean plane by using the singular curve theory. We demonstrate that the singular points of the generalized antiorthotomic sweep out the evolute of the (n, m)-cusp curve. We also investigate the behavior and singular characteristics of the antiorthotomic of the (n, m)-cusp curve. Moreover, we define parallels for (n, m)-cusp curves and reveal the relationship between parallels and generalized antiorthotomics. Finally, repeated antiorthotomics are studied, which is useful for identifying the characteristics of (n, m)-cusp curves.

Keywords: generalized antiorthotomics; (n, m)-cusp curves; singularities; evolutes; parallels (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2025
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