Giblin, Peter, Reeve, Graham and Uribe-Vargas, Ricardo
(2022)
Contact With Circles and Euclidean Invariants of Smooth Surfaces in Double-struck capital R<SUP>3</SUP>.
QUARTERLY JOURNAL OF MATHEMATICS, 73 (3).
pp. 937-967.
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Abstract
<jats:title>Abstract</jats:title> <jats:p>We investigate the vertex curve, that is the set of points in the hyperbolic region of a smooth surface in real 3-space at which there is a circle in the tangent plane having at least 5-point contact with the surface. The vertex curve is related to the differential geometry of planar sections of the surface parallel to and close to the tangent planes, and to the symmetry sets of isophote curves, that is level sets of intensity in a 2-dimensional image. We investigate also the relationship of the vertex curve with the parabolic and flecnodal curves, and the evolution of the vertex curve in a generic 1-parameter family of smooth surfaces.</jats:p>
| Item Type: | Article |
|---|---|
| Divisions: | Faculty of Science and Engineering > School of Physical Sciences |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 06 Apr 2022 13:15 |
| Last Modified: | 18 Oct 2023 08:44 |
| DOI: | 10.1093/qmath/haab058 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3152268 |
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