Focal surfaces and evolutes of framed curves in hyperbolic 3-space from the viewpoint of Legendrian duality
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866917796179345408 |
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| author | Yu, Haibo Chen, Liang |
| author_facet | Yu, Haibo Chen, Liang |
| contents | A hyperbolic framed curve is a smooth curve with a moving frame in hyperbolic 3-space. It may have singularities. By using this moving frame, we can investigate the differential geometry properties of curves, even at singular points. In fact, we consider the focal surfaces and evolutes of hyperbolic framed curves by using Legendrian dualities which developed by Chen and Izumiya. The focal surfaces are the dual surfaces of tangent indicatrix of original curves. Moreover, classifications of singularities of the serval dual surfaces are shown. By this, we give the relationship among focal surfaces, evolutes and dual surfaces of evolutes. Finally, we study duality relations of singularities between focal surfaces and dual surfaces of evolutes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_04888 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Focal surfaces and evolutes of framed curves in hyperbolic 3-space from the viewpoint of Legendrian duality Yu, Haibo Chen, Liang Differential Geometry Mathematical Physics Geometric Topology A hyperbolic framed curve is a smooth curve with a moving frame in hyperbolic 3-space. It may have singularities. By using this moving frame, we can investigate the differential geometry properties of curves, even at singular points. In fact, we consider the focal surfaces and evolutes of hyperbolic framed curves by using Legendrian dualities which developed by Chen and Izumiya. The focal surfaces are the dual surfaces of tangent indicatrix of original curves. Moreover, classifications of singularities of the serval dual surfaces are shown. By this, we give the relationship among focal surfaces, evolutes and dual surfaces of evolutes. Finally, we study duality relations of singularities between focal surfaces and dual surfaces of evolutes. |
| title | Focal surfaces and evolutes of framed curves in hyperbolic 3-space from the viewpoint of Legendrian duality |
| topic | Differential Geometry Mathematical Physics Geometric Topology |
| url | https://arxiv.org/abs/2410.04888 |