Results 31 to 40 of about 2,856 (140)

Napoleon’s quasigroups

open access: yesMathematica Slovaca, 2011
Abstract Napoleon’s quasigroups are idempotent medial quasigroups satisfying the identity (ab·b)(b·ba) = b. In works by V. Volenec geometric terminology has been introduced in medial quasigroups, enabling proofs of many theorems of plane geometry to be carried out by formal calculations in a quasigroup.
openaire   +3 more sources

On a “grouplike” family of quasigroups

open access: yesExamples and Counterexamples
Quasigroups are algebraic structures in which divisibility is always defined. This paper illustrates some similarities and differences between quasigroup theory and group theory, by singling out a special family of quasigroups which seem to be most ...
Ahmed Al Fares, Gizem Karaali
doaj   +1 more source

Pseudococyclic Partial Hadamard Matrices over Latin Rectangles

open access: yesMathematics, 2021
The classical design of cocyclic Hadamard matrices has recently been generalized by means of both the notions of the cocycle of Hadamard matrices over Latin rectangles and the pseudococycle of Hadamard matrices over quasigroups.
Raúl M. Falcón   +4 more
doaj   +1 more source

The use of data-mining for the automatic formation of tactics [PDF]

open access: yes, 2004
This paper discusses the usse of data-mining for the automatic formation of tactics. It was presented at the Workshop on Computer-Supported Mathematical Theory Development held at IJCAR in 2004. The aim of this project is to evaluate the applicability of
Bundy, A.   +4 more
core  

How Nonassociative Geometry Describes a Discrete Spacetime

open access: yesFrontiers in Physics, 2019
Nonassociative geometry, providing a unified description of discrete and continuum spaces, is a valuable candidate for the study of discrete models of spacetime. Within the framework of nonassociative geometry we propose a model of emergent spacetime. In
Alexander I. Nesterov, Héctor Mata
doaj   +1 more source

Candidate One-Way Functions and One-Way Permutations Based on Quasigroup String Transformations [PDF]

open access: yes, 2005
In this paper we propose a definition and construction of a new family of one-way candidate functions ${\cal R}_N:Q^N \to Q^N$, where $Q=\{0,1,...,s-1\}$ is an alphabet with $s$ elements.
Gligoroski, Danilo
core   +2 more sources

CYCLIC ENTROPIC QUASIGROUPS

open access: yesDemonstratio Mathematica, 2009
AbstractIn this paper we explain the relationship of some entropic quasigroups to abelian groups with involution. It is known that (
Grzegorz Bińczak, Joanna Kaleta
openaire   +1 more source

Newton da Costa and the school of Curitiba

open access: yesManuscrito, 2011
This paper intends to report on the beginning of the publications of Newton da Costa outside Brazil. Two mathematicians played an important role in this beginning: Marcel Guillaume from the University of Clermont-Ferrand and Paul Dedecker from the ...
Artibano Micali
doaj   +1 more source

Yetter–Drinfeld Modules for Group-Cograded Hopf Quasigroups

open access: yesMathematics, 2022
Let H be a crossed group-cograded Hopf quasigroup. We first introduce the notion of p-Yetter–Drinfeld quasimodule over H. If the antipode of H is bijective, we show that the category YDQ(H) of Yetter–Drinfeld quasimodules over H is a crossed category ...
Huili Liu, Tao Yang, Lingli Zhu
doaj   +1 more source

On a connection between the switching separability of a graph and that of its subgraphs

open access: yes, 2011
A graph of order $n>3$ is called {switching separable} if its modulo-2 sum with some complete bipartite graph on the same set of vertices is divided into two mutually independent subgraphs, each having at least two vertices.
D. S. Krotov   +6 more
core   +1 more source

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