Results 1 to 10 of about 302 (37)

Deforming a Convex Hypersurface by Anisotropic Curvature Flows

open access: yesAdvanced Nonlinear Studies, 2021
In this paper, we consider a fully nonlinear curvature flow of a convex hypersurface in the Euclidean 𝑛-space. This flow involves 𝑘-th elementary symmetric function for principal curvature radii and a function of support function.
Ju HongJie, Li BoYa, Liu YanNan
doaj   +1 more source

On the Hermitian structures of the sequence of tangent bundles of an affine manifold endowed with a Riemannian metric

open access: yesComplex Manifolds, 2022
Let (M, ∇, 〈, 〉) be a manifold endowed with a flat torsionless connection r and a Riemannian metric 〈, 〉 and (TkM)k≥1 the sequence of tangent bundles given by TkM = T(Tk−1M) and T1M = TM. We show that, for any k ≥ 1, TkM carries a Hermitian structure (Jk,
Boucetta Mohamed
doaj   +1 more source

The General Dual Orlicz Geominimal Surface Area

open access: yesJournal of Function Spaces, 2020
In this paper, we study the general dual Orlicz geominimal surface area by the general dual Orlicz mixed volume which was introduced by Gardner et al. (2019).
Ni Li, Shuang Mou
doaj   +1 more source

Singularities of Blaschke normal maps of convex surfaces [PDF]

open access: yes, 2010
We prove that the difference between the numbers of positive swallowtails and negative swallowtails of the Blaschke normal map for a given convex surface in affine space is equal to the Euler number of the subset where the affine shape operator has ...
Arnol'd   +9 more
core   +3 more sources

An isomorphic version of the Busemann-Petty problem for arbitrary measures [PDF]

open access: yes, 2014
We prove the following theorem. Let $\mu$ be a measure on $R^n$ with even continuous density, and let $K,L$ be origin-symmetric convex bodies in $R^n$ so that $\mu(K\cap H)\le \mu(L\cap H)$ for any central hyperplane H.
Koldobsky, Alexander, Zvavitch, Artem
core   +1 more source

On the stability of the $p$-affine isoperimetric inequality

open access: yes, 2013
Employing the affine normal flow, we prove a stability version of the $p$-affine isoperimetric inequality for $p\geq1$ in $\mathbb{R}^2$ in the class of origin-symmetric convex bodies.
Ivaki, Mohammad N.
core   +1 more source

Group-theoretic Approach for Symbolic Tensor Manipulation: II. Dummy Indices

open access: yes, 2001
Computational Group Theory is applied to indexed objects (tensors, spinors, and so on) with dummy indices. There are two groups to consider: one describes the intrinsic symmetries of the object and the other describes the interchange of names of dummy ...
B. F. SVAITER   +2 more
core   +1 more source

Geometric realizations, curvature decompositions, and Weyl manifolds

open access: yes, 2010
We show any Weyl curvature model can be geometrically realized by a Weyl ...
Gilkey, Peter   +2 more
core   +1 more source

Envelope of mid-planes of a surface and some classical notions of affine differential geometry

open access: yes, 2017
For a pair of points in a smooth locally convex surface in 3-space, its mid-plane is the plane containing its mid-point and the intersection line of the corresponding pair of tangent planes.
Craizer, Marcos, Junior, Ady Cambraia
core   +1 more source

Geometric invariants properties of osculating curves under conformal transformation in Euclidean space ℝ3

open access: yesDemonstratio Mathematica
An osculating curve is a type of curve in space that holds significance in the study of differential geometry. In this article, we investigate certain geometric invariants of osculating curves on smooth and regularly immersed surfaces under conformal ...
Singh Kuljeet   +2 more
doaj   +1 more source

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