Homothetic packings of centrally symmetric convex bodies

نویسندگان

چکیده

A centrally symmetric convex body is a compact set with non-empty interior that about the origin. Of particular interest are those both smooth and strictly convex—known here as regular bodies—since they retain many of useful properties d-dimensional Euclidean ball. We prove for any given C, homothetic packing copies C randomly chosen radii will have (2, 2)-sparse planar contact graph. further there exists comeagre bodies where graph can be realised stress-free C.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Pairs of Convex Bodies with Centrally Symmetric Intersections of Translates

For a pair of convex bodies K and K ′ in Ed , the d-dimensional intersections K ∩ (x + K ′), x ∈ Ed , are centrally symmetric if and only if K and K ′ are represented as direct sums K = R ⊕ P and K ′ = R′ ⊕ P ′ such that: (i) R is a compact convex set of some dimension m, 0 ≤ m ≤ d, and R′ = z − R for a suitable vector z ∈ Ed , (ii) P and P ′ are isothetic parallelotopes, both of dimension d − m.

متن کامل

On Shadow Boundaries of Centrally Symmetric Convex Bodies

We discuss the concept of the so-called shadow boundary belonging to a given direction x of Euclidean n-space R lying in the boundary of a centrally symmetric convex body K. Actually, K can be considered as the unit ball of a finite dimensional normed linear (= Minkowski) space. We introduce the notion of the general parameter spheres of K corresponding to the above direction x and prove that i...

متن کامل

Maximal Sections and Centrally Symmetric Bodies

Let d ≥ 2 and let K ⊂ R be a convex body containing the origin 0 in its interior. Let, for each direction ω, the (d − 1)–volume of the intersection of K and an arbitrary hyperplane with normal ω attain its maximum if the hyperplane contains 0. Then K is symmetric about 0. The proof uses a linear integro–differential operator on S, whose null–space needs to be, and will be determined.

متن کامل

On Non-separable Families of Positive Homothetic Convex Bodies

A finite family B of balls with respect to an arbitrary norm inRd (d ≥ 2) is called a non-separable family if there is no hyperplane disjoint from ⋃ B that strictly separates some elements of B from all the other elements of B in Rd . In this paper we prove that if B is a non-separable family of balls of radii r1, r2, . . . , rn (n ≥ 2) with respect to an arbitrary norm in Rd (d ≥ 2), then B ca...

متن کامل

UPPER BOUNDS FOR THE COVERING NUMBER OF CENTRALLY SYMMETRIC CONVEX BODIES IN Rn

The covering number c(K) of a convex body K is the least number of smaller homothetic copies of K needed to cover K . We provide new upper bounds for c(K) when K is centrally symmetric by introducing and studying the generalized α -blocking number βα 2 (K) of K . It is shown that when a centrally symmetric convex body K is sufficiently close to a centrally symmetric convex body K′ , then c(K) i...

متن کامل

ذخیره 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: Geometriae Dedicata

سال: 2022

ISSN: ['0046-5755', '1572-9168']

DOI: https://doi.org/10.1007/s10711-022-00675-w