Results 11 to 20 of about 18,831 (324)

Selectivity in quaternion algebras [PDF]

open access: greenJournal of Number Theory, 2012
We prove an integral version of the classical Albert-Brauer-Hasse-Noether theorem regarding quaternion algebras over number fields. Let $\mathfrak A$ be a quaternion algebra over a number field $K$ and assume that $\mathfrak A$ satisfies the Eichler condition; that is, there exists an archimedean prime of $K$ which does not ramify in $\mathfrak A$. Let
Benjamin Linowitz
openaire   +3 more sources

Wiener Algebra for the Quaternions [PDF]

open access: greenMediterranean Journal of Mathematics, 2015
We define and study the counterpart of the Wiener algebra in the quaternionic setting, both for the discrete and continuous case. We prove a Wiener-L vy type theorem and a factorization theorem. We give applications to Toeplitz and Wiener-Hopf operators.
Alpay, Daniel   +3 more
openaire   +5 more sources

The Lorentz Group Using Conformal Geometric Algebra and Split Quaternions for Color Image Processing: Theory and Practice [PDF]

open access: goldIEEE Access, 2023
The processing of color images is of great interest, because the human perception of color is a very complex process, still not well understood. In this article, firstly the authors present an analysis of the well-known mathematical methods used to model
Eduardo Bayro-Corrochano   +2 more
doaj   +2 more sources

Generalised quadratic forms and the u-invariant [PDF]

open access: yes, 2017
The u-invariant of a field is the supremum of the dimensions of anisotropic quadratic forms over the field. We define corresponding u-invariants for hermitian and generalised quadratic forms over a division algebra with involution in characteristic 2 and
Dolphin, Andrew
core   +2 more sources

Algebraic Techniques for Canonical Forms and Applications in Split Quaternionic Mechanics

open access: yesJournal of Mathematics, 2023
The algebra of split quaternions is a recently increasing topic in the study of theory and numerical computation in split quaternionic mechanics. This paper, by means of a real representation of a split quaternion matrix, studies the problem of canonical
Tongsong Jiang   +4 more
doaj   +1 more source

Unitary Diagonalization of the Generalized Complementary Covariance Quaternion Matrices with Application in Signal Processing

open access: yesMathematics, 2023
Let H denote the quaternion algebra. This paper investigates the generalized complementary covariance, which is the ϕ-Hermitian quaternion matrix. We give the properties of the generalized complementary covariance matrices.
Zhuo-Heng He   +2 more
doaj   +1 more source

Quaternion Algebras and Generalized Fibonacci–Lucas Quaternions [PDF]

open access: yesAdvances in Applied Clifford Algebras, 2015
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Flaut, Cristina, Savin, Diana
openaire   +1 more source

Review of Quaternion Differential Equations: Historical Development, Applications, and Future Direction

open access: yesAxioms, 2023
Quaternion is a four-dimensional and an extension of the complex number system. It is often viewed from various fields, such as analysis, algebra, and geometry.
Alit Kartiwa   +3 more
doaj   +1 more source

Quaternion quadratic equations in characteristic 2 [PDF]

open access: yes, 2014
In this paper we present a solution for any standard quaternion quadratic equation, i.e. an equation of the form $z^2+\mu z+\nu=0$ where $\mu$ and $\nu$ belong to some quaternion division algebra $Q$ over some field $F$, assuming the characteristic of $F$
Chapman, Adam
core   +1 more source

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

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