Results 31 to 40 of about 19,971 (282)

Some Equivalence Relations and Results over the Commutative Quaternions and Their Matrices

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2017
In this paper, we give some equivalence relations and results over the commutative quaternions and their matrices. In this sense, consimilarity, semisimilarity, and consemisimilarity over the commutative quaternion algebra and commutative quaternion ...
Kosal Hidayet Huda, Tosun Murat
doaj   +1 more source

Right linear map preserving the left spectrum of 2x2 quaternion matrices; pp. 378–386 [PDF]

open access: yesProceedings of the Estonian Academy of Sciences, 2018
In this paper, the form of a right linear map preserving the left spectrum of quaternion matrices of order 2 is characterized. The obtained conclusion is different from the classical results of the linear map preserving eigenvalues of complex matrices.
Deyu Duan   +3 more
doaj   +1 more source

A survey on the computation of quaternions from rotation matrices [PDF]

open access: yes, 2019
The parameterization of rotations is a central topic in many theoretical and applied fields such as rigid body mechanics, multibody dynamics, robotics, spacecraft attitude dynamics, navigation, 3D image processing, computer graphics, etc.
Sarabandi, Soheil, Thomas, Federico
core   +2 more sources

Iterative Algorithm for Solving a Class of Quaternion Matrix Equation over the Generalized (P,Q)-Reflexive Matrices

open access: yesAbstract and Applied Analysis, 2013
The matrix equation ∑l=1uAlXBl+∑s=1vCsXTDs=F, which includes some frequently investigated matrix equations as its special cases, plays important roles in the system theory.
Ning Li, Qing-Wen Wang
doaj   +1 more source

Quaternion feedback attitude control system design based on weighted–L2–gain performance

open access: yesResults in Engineering, 2023
The operation and accomplishment of a satellite's mission depend on its capacity to control its attitude. A rotation matrix parameterization, such as a (unit) quaternion, is frequently used to represent the attitude information needed for attitude ...
Harry Septanto   +2 more
doaj   +1 more source

Permanental processes from products of complex and quaternionic induced Ginibre ensembles [PDF]

open access: yes, 2014
We consider products of independent random matrices taken from the induced Ginibre ensemble with complex or quaternion elements. The joint densities for the complex eigenvalues of the product matrix can be written down exactly for a product of any fixed ...
Akemann, G., Ipsen, J. R., Strahov, E.
core   +1 more source

Least Squares Pure Imaginary Solution and Real Solution of the Quaternion Matrix Equation AXB+CXD=E with the Least Norm

open access: yesJournal of Applied Mathematics, 2014
Using the Kronecker product of matrices, the Moore-Penrose generalized inverse, and the complex representation of quaternion matrices, we derive the expressions of least squares solution with the least norm, least squares pure imaginary solution with the
Shi-Fang Yuan
doaj   +1 more source

Ninety-Six Distinct Real Matrices for Representing a Quaternion Number

open access: yesJournal of Mathematics, 2020
In this paper, we investigate on the number of all possible real matrices representing a quaternion number as three 4×4 skew-symmetric matrices plus the identity matrix of order 4, and how to determine these matrices.
W. E. Ahmed
doaj   +1 more source

Review of Quaternion-Based Color Image Processing Methods

open access: yesMathematics, 2023
Images are a convenient way for humans to obtain information and knowledge, but they are often destroyed throughout the collection or distribution process.
Chaoyan Huang, Juncheng Li, Guangwei Gao
doaj   +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

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