Results 31 to 40 of about 666,240 (259)

Blocks with quaternion defect group over a 2-adic ring: the case \tilde{A}_4 [PDF]

open access: yes, 2007
Except for blocks with a cyclic or Klein four defect group, it is not known in general whether the Morita equivalence class of a block algebra over a field of prime characteristic determines that of the corresponding block algebra over a p-adic ring.
Broué   +6 more
core   +1 more source

Cauchy matrix and Liouville formula of quaternion impulsive dynamic equations on time scales

open access: yesOpen Mathematics, 2020
In this study, we obtain the scalar and matrix exponential functions through a series of quaternion-valued functions on time scales. A sufficient and necessary condition is established to guarantee that the induced matrix is real-valued for the complex ...
Li Zhien, Wang Chao
doaj   +1 more source

Predicting Rigid Body Dynamics Using Dual Quaternion Recurrent Neural Networks With Quaternion Attention

open access: yesIEEE Access, 2022
We propose a novel neural network architecture based on dual quaternions which allow for a compact representation of information with a main focus on describing rigid body movements.
Johannes Poppelbaum, Andreas Schwung
doaj   +1 more source

Generalized Quaternions and Matrix Algebra

open access: yesAfyon Kocatepe University Journal of Sciences and Engineering, 2023
In this paper, we established the connection between generalized quaternion algebra and real (complex) matrix algebras by using Hamilton operators. We obtained real and complex matrices corresponding to the real and complex basis of the generalized quaternions. Also, we investigated the basis features of real and complex matrices. We get Pauli matrices
Erhan ATA, Ümit Ziya SAVCI
openaire   +3 more sources

Dual Quaternions for the Kinematic Description of a Fish–Like Propulsion System

open access: yesInternational Journal of Applied Mathematics and Computer Science, 2023
This study discusses the use of quaternions and dual quaternions in the description of artificial fish kinematics. The investigation offered here illustrates quaternion and dual quaternion algebra, as well as its implementation in the software chosen ...
Kitowski Zygmunt   +2 more
doaj   +1 more source

Quad-Quaternion MUSIC for DOA Estimation Using Electromagnetic Vector Sensors

open access: yesEURASIP Journal on Advances in Signal Processing, 2008
A new quad-quaternion model is herein established for an electromagnetic vector-sensor array, under which a multidimensional algebra-based direction-of-arrival (DOA) estimation algorithm, termed as quad-quaternion MUSIC (QQ-MUSIC), is proposed.
Xiaofeng Gong, Zhiwen Liu, Yougen Xu
doaj   +1 more source

Quaternion based generalization of Chern–Simons theories in arbitrary dimensions

open access: yesPhysics Letters B, 2017
A generalization of Chern–Simons gauge theory is formulated in any dimension and arbitrary gauge group where gauge fields and gauge parameters are differential forms of any degree.
Alessandro D'Adda   +3 more
doaj   +1 more source

A Clifford algebra associated to generalized Fibonacci quaternions

open access: yes, 2014
In this paper we find a Clifford algebra associated to generalized Fibonacci quaternions. In this way, we provide a nice algorithm to obtain a division quaternion algebra starting from a quaternion non-division algebra and vice ...
Flaut, Cristina
core   +1 more source

Quaternionic lie algebras

open access: yesLinear Algebra and its Applications, 1984
Let k be a field of characteristic not equal to 2, and let L be a finite field extension of k. Then a Lie algebra G is quaternionic if there is a quaternion division algebra Q over L such that G is isomorphic to the k- Lie-algebra \(Q^-/L1\). The main theorem of the paper gives equivalent conditions for a finite-dimensional Lie algebra over a perfect ...
openaire   +2 more sources

Convolution Theorems for Quaternion Fourier Transform: Properties and Applications

open access: yesAbstract and Applied Analysis, 2013
General convolution theorems for two-dimensional quaternion Fourier transforms (QFTs) are presented. It is shown that these theorems are valid not only for real-valued functions but also for quaternion-valued functions. We describe some useful properties
Mawardi Bahri   +2 more
doaj   +1 more source

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