Parameterized discrete uniformization theorems and curvature flows for polyhedral surfaces, II
نویسندگان
چکیده
This paper investigates the combinatorial $\alpha$-curvature for vertex scaling of piecewise hyperbolic metrics on polyhedral surfaces, which is a parameterized generalization classical curvature. A discrete uniformization theorem established, generalizes Gu-Guo-Luo-Sun-Wuâs curvature [J. Differential Geom. 109 (2018), pp. 431â466]. We further introduce $\alpha$-Yamabe flow and $\alpha$-Calabi to find with prescribed $\alpha$-curvatures. To handle potential singularities along flows, we do surgery flows by edge flipping. Using conformal theory established Gu-Guo-Luo-Sun-Wu 431â466], prove longtime existence convergence surgery, provide effective algorithms finding
منابع مشابه
Discrete Curvature Approximations and Segmentation of Polyhedral Surfaces
The segmentation of digitized data to divide a free form surface into patches is one of the key steps required to perform a reverse engineering process of an object. To this end, discrete curvature approximations are introduced as the basis of a segmentation process that lead to a decomposition of digitized data into areas that will help the construction of parametric surface patches. The appro...
متن کاملDiscrete Curvature Flows for Surfaces and 3-Manifolds
Intrinsic curvature flows can be used to design Riemannian metrics by prescribed curvatures. This chapter presents three discrete curvature flow methods that are recently introduced into the engineering fields: the discrete Ricci flow and discrete Yamabe flow for surfaces with various topology, and the discrete curvature flow for hyperbolic 3manifolds with boundaries. For each flow, we introduc...
متن کاملPolyhedral Surfaces of Constant Mean Curvature
way, say, by assigning a length to each edge which fulÞlls the triangle identity on each triangle. In a locally Euclidean metric the distance between two points is measured along curves whose length is measured segment-wise on the open edges and triangles: DeÞnition 15 A curve γ on a simplicial complex M is called rectiÞable, if for every simplex σ ∈ M the part γ|σ is rectiÞable w.r.t. to the s...
متن کاملCombinatorial Ricci Curvature for Polyhedral Surfaces and Posets
The combinatorial Ricci curvature of Forman, which is defined at the edges of a CW complex, and which makes use of only the face relations of the cells in the complex, does not satisfy an analog of the Gauss-Bonnet Theorem, and does not behave analogously to smooth surfaces with respect to negative curvature. We extend this curvature to vertices and faces in such a way that the problems with co...
متن کاملDiscrete uniformization of finite branched covers over the Riemann sphere via hyper-ideal circle patterns
With the help of hyper-ideal circle pattern theory, we have developed a discrete version of the classical uniformization theorems for surfaces represented as finite branched covers over the Riemann sphere as well as compact polyhedral surfaces with non-positive curvature. We show that in the case of such surfaces discrete uniformization via hyper-ideal circle patterns always exists and is uniqu...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Transactions of the American Mathematical Society
سال: 2022
ISSN: ['2330-0000']
DOI: https://doi.org/10.1090/tran/8572