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Now showing items 641-650 of 678
Article
Partial Latin rectangle graphs and autoparatopism groups of partial Latin rectangles with trivial autotopism groups
(Elsevier, 2017)
An $r \times s$ partial Latin rectangle $(l_{ij})$ is an $r \times s$ matrix containing elements of $\{1,2,\ldots,n\} \cup \{\cdot\}$ such that each row and each column contain at most one copy of any symbol in $\{1,2,\ldots,n\}$. ...
Article
Classification of some nilpotent class of leibniz superalgebras
(Springer, 2010)
The aim of this work is to present the description of Leibniz superalgebras up to isomorphism with characteristic sequence (n|m − 1, 1) and nilindex n + m.
Article
Contrast in Greyscales of Graphs
(Springer, 2020)
In this paper,we present the notion of greyscale of a graph, as a colouring of its vertices that uses colours from the continuous spectrum [0, 1]. Any greyscale induces another colouring by assigning to each edge the ...
Article
Integration of a CAS/DGS as a CAD system in the mathematics curriculum for architecture students
(Taylor & Francis, 2011-09-15)
Students of Architecture and Building Engineering Degrees work withComputer Aided Design systems daily in order to design and modelarchitectonic constructions. Since this kind of software is based on thecreation and ...
Article
The difference between the metric dimension and the determining number of a graph
(2014)
We study the maximum value of the difference between the metric dimension and the determining number of a graph as a function of its order. We develop a technique that uses functions related to locating-dominating sets to ...
Article
Scutoids are a geometrical solution to three-dimensional packing of epithelia
(Nature Publishing Group, 2018)
As animals develop, tissue bending contributes to shape the organs into complex three-dimensional structures. However, the architecture and packing of curved epithelia remains largely unknown. Here we show by means of ...
Article
The Classification of Naturally Graded p-Filiform Leibniz Algebras
(Taylor and Francis, 2010)
In the present article the classification of n-dimensional naturally graded p-filiform (1 ≤ p ≤ n − 4) Leibniz algebras is obtained. A splitting of the set of naturally graded Leibniz algebras into the families of Lie ...
Article
Algebra Structures on the Twisted Eilenberg–Zilber Theorem
(Taylor and Francis, 2007)
Let G, G′, and G ×τ G′ be three simplicial groups (not necessarily abelian) and C N (G) ⊗ t C N (G′) be the “twisted” tensor product associated to C N (G ×τ G′) by the twisted Eilenberg–Zilber theorem. Here we prove that ...
Article
Fractal Topological Analysis for 2D Binary Digital Images
(Springer, 2019)
Fractal dimension is a powerful tool employed as a measurement of geometric aspects. In this work we propose a method of topological fractal analysis for 2D binary digital images by using a graph-based topological model ...
Article
The Bernstein problem for elliptic Weingarten multigraphs
(Cornell University, 2020)
We prove that any complete, uniformly ellipticWeingarten surface in Euclidean 3-space whose Gauss map image omits an open hemisphere is a cylinder or a plane. This generalizes a classical theorem by Hoffman, Osserman and ...