Results 51 to 60 of about 44,177 (192)

Bounding Regions to Plane Steepest Descent Curves of Quasiconvex Families

open access: yesJournal of Applied Mathematics, 2016
Two-dimensional steepest descent curves (SDC) for a quasiconvex family are considered; the problem of their extensions (with constraints) outside of a convex body K is studied.
Marco Longinetti   +2 more
doaj   +1 more source

The convex floating body

open access: yesApplied Mathematics Letters, 2001
AbstractThe convex floating body of a polytope is constructed and parametric variation of its volume and surface area functionals are illustrated through example.
openaire   +2 more sources

Reduced spherical convex bodies [PDF]

open access: yesBulletin of the Polish Academy of Sciences Mathematics, 2018
The aim of this paper is to present some properties of reduced spherical convex bodies on the two-dimensional sphere $S^2$. The intersection of two different non-opposite hemispheres is called a lune. By its thickness we mean the distance of the centers of the two semicircles bounding it.
Michał Musielak, Marek Lassak
openaire   +3 more sources

On convex bodies of constant width

open access: yesTopology and its Applications, 2006
6 ...
Michael Zarichnyi, Lidia Bazylevych
openaire   +3 more sources

On the Lassak Conjecture for a Convex Body

open access: yesМоделирование и анализ информационных систем, 2011
In 1993 M. Lassak formulated (in the equivalent form) the following conjecture. If we can inscribe a translate of the cube $[0,1]^n$ into a convex body $C \subset R^n$, then $\sum_{i=1}^n \frac{1}{\omega_i} \geq 1$. Here $\omega_i$ denotes the width of $
M. V. Nevskii
doaj  

On convex class of pairs of convex bodies [PDF]

open access: yesProceedings of the American Mathematical Society, 1997
In this paper we introduce a quotient class of pairs of convex bodies in which every member have convex union. The space of pairs of convex bodies has been investigated in a number of papers [3], [8], [9], and [12]. This space has found an application in quasidifferential calculus (cf. [1], [5], [7], [10]).
Ryszard Urbański, Jerzy Grzybowski
openaire   +1 more source

Symmetry breaking and the geometry of reduced density matrices

open access: yesNew Journal of Physics, 2016
The concept of symmetry breaking and the emergence of corresponding local order parameters constitute the pillars of modern day many body physics. We demonstrate that the existence of symmetry breaking is a consequence of the geometric structure of the ...
V Zauner   +4 more
doaj   +1 more source

Covering functionals of cones and double cones

open access: yesJournal of Inequalities and Applications, 2018
The least positive number γ such that a convex body K can be covered by m translates of γK is called the covering functional of K (with respect to m), and it is denoted by Γm(K) $\Gamma_{m}(K)$.
Senlin Wu, Ke Xu
doaj   +1 more source

Minimum convex partitions and maximum empty polytopes

open access: yesJournal of Computational Geometry, 2014
Let S be a set of n points in Rd. A Steiner convex partition is a tiling of conv(S) with empty convex bodies. For every integer d, we show that S admits a Steiner convex partition with at most ⌈(n-1)/d⌉ tiles.
Adrian Dumitrescu   +2 more
doaj   +1 more source

Inequalities for the Difference Body of a Convex Body [PDF]

open access: yesProceedings of the American Mathematical Society, 1967
In the following, S will denote the boundary of the unit ball in En, and u a variable point of S (so u is a unit vector, or "direction"). The polar equation of the boundary of DK is given by p=p(u), uCS, so p(u) is the radius of DK in the direction u.
openaire   +1 more source

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