Results 71 to 80 of about 20,938 (205)

Three Cubes Packing for All Dimensions

open access: yesAlgorithms
Let Vn(d) denote the least number such that every collection of nd-cubes with total volume 1 in d-dimensional (Euclidean) space can be packed parallelly into some d-box of volume Vn(d). We show that V3(d)=r1−dd if d≥11 and V3(d)=1r+1rd+1r−rd+1 if 2≤d≤10, where r is the only solution of the equation 2(d−1)kd+dkd−1=1 on 22,1 and (k+1)d(1−k)d−1dk2+d+k−1 ...
openaire   +2 more sources

Packing-dimension profiles and fractional Brownian motion

open access: yes, 2008
In order to compute the packing dimension of orthogonal projections Falconer and Howroyd (1997) have introduced a family of packing dimension profiles Dims that are parametrized by real numbers s> 0. Subsequently, Howroyd (2001) introduced alternate s-
Yimin Xiao, Davar Khoshnevisan
core  

π-π2max: Bridging molecular characteristics to crystal packing in nitro-containing two-dimensional energetic materials

open access: yesDefence Technology
Two-dimensional energetic materials (2DEMs), characterized by their exceptional interlayer sliding properties, are recognized as exemplar of low-sensitivity energetic materials.
Xiaokai He   +6 more
doaj   +1 more source

Dagstuhl Reports : Volume 1, Issue 2, February 2011

open access: yes, 2011
Online Privacy: Towards Informational Self-Determination on the Internet (Dagstuhl Perspectives Workshop 11061) : Simone Fischer-Hübner, Chris Hoofnagle, Kai Rannenberg, Michael Waidner, Ioannis Krontiris and Michael Marhöfer Self-Repairing Programs ...
Schloss Dagstuhl, Leibniz-Zentrum für Informatik
core  

Directed graph iterated function systems

open access: yes, 2011
This thesis concerns an active research area within fractal geometry. In the first part, in Chapters 2 and 3, for directed graph iterated function systems (IFSs) defined on ℝ, we prove that a class of 2-vertex directed graph IFSs have attractors that ...
Boore, Graeme C.
core  

Bowen's equations for upper metric mean dimension with potential

open access: yes, 2022
Firstly, we introduce a new notion called induced upper metric mean dimension with potential, which naturally generalizes the definition of upper metric mean dimension with potential given by Tsukamoto to more general cases, then we establish variational
Yang, Rui, Zhou, Xiaoyao, Chen, Ercai
core   +1 more source

On distance sets, box-counting and Ahlfors-regular sets

open access: yesDiscrete Analysis, 2017
On distance sets, box-counting and Ahlfors-regular sets, Discrete Analysis 2017:9, 22 pp. A well-known problem of Falconer, a sort of continuous analogue of the Erdős distinct-distance problem, asks how large the Hausdorff dimension of a Borel subset of
Pablo Shmerkin
doaj   +1 more source

Effective packing dimension of Π 0 1-classes

open access: yes, 2007
We construct a Π0 1-class X that has classical packing dimension 0 and effective packing dimension 1. This implies that, unlike in the case of effective Hausdorff dimension, there is no natural correspondence principle (as defined by Lutz) for effective ...
Chris J. Conidis
core  

The complexity of combinatorial optimization problems on d‐dimensional boxes [PDF]

open access: yes, 2007
The Maximum Independent Set problem in d-box graphs, i.e., in intersection graphs of axis-parallel rectangles in R-d, is known to be NP-hard for any fixed d >= 2.
Chlebikova, Janka   +5 more
core   +1 more source

Hardness and Approximability of Dimension Reduction on the Probability Simplex

open access: yesAlgorithms
Dimension reduction is a technique used to transform data from a high-dimensional space into a lower-dimensional space, aiming to retain as much of the original information as possible.
Roberto Bruno
doaj   +1 more source

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