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This paper presents an experimental study on the application of quaternions in several machine learning algorithms. Quaternion is a mathematical representation of rotation in three-dimensional space, which can be used to represent complex…

Machine Learning · Computer Science 2023-08-07 Tianlei Zhu , Renzhe Zhu

The satisfactory development of Quaternionic Analysis has indicated new solutions for physical and mathematical problems. It is worth mentioning the fact that quaternions possess four dimensions, and in this way they may be considered as…

Mathematical Physics · Physics 2015-08-25 J. Marão

Every quadratic form represents 0; therefore, if we take any number of quadratic forms and ask which integers are simultaneously represented by all members of the collection, we are guaranteed a nonempty set. But when is that set more than…

Number Theory · Mathematics 2017-08-17 Christopher Donnay , Havi Ellers , Kate O'Connor , Katherine Thompson , Erin Wood

A comprehensive analysis of the morphology of the solution space for a special type of quadratic quaternion equation is presented. This equation, which arises in a surface construction problem, incorporates linear terms in a quaternion…

Complex Variables · Mathematics 2016-01-14 Rida T. Farouki , Graziano Gentili , Carlotta Giannelli , Alessandra Sestini , Caterina Stoppato

In this paper we classify and derive closed formulas for geometric elements of quadrics in rational B\'ezier triangular form (such as the center, the conic at infinity, the vertex and the axis of paraboloids and the principal planes), using…

Graphics · Computer Science 2016-02-05 A. Cantón , L. Fernández-Jambrina , M. E. Rosado María , M. J. Vázquez-Gallo

Quaternions are an important tool to describe the orientation of a molecule. This paper considers the use of quaternions in matching two conformations of a molecule, in interpolating rotations, in performing statistics on orientational…

Computational Physics · Physics 2007-05-23 Charles F. F. Karney

We devise a method that reduces the problem of classifying systems of forms and linear mappings to the problem of classifying systems of linear mappings. Canonical matrices of (i) bilinear or sesquilinear forms, (ii) pairs of symmetric,…

Representation Theory · Mathematics 2008-01-08 Vladimir V. Sergeichuk

When the Euclidean algorithm produces a symmetric sequence of quotients, we give explicit formulas for the remainders that allow the analysis of two families of quadratic forms in the remainders.

Number Theory · Mathematics 2014-02-07 Barry R. Smith

We study some properties of quadratic forms with values in a field whose underlying vector spaces are endowed with the structure of right vector spaces over a division ring extension of that field. Some generalized notions of isotropy,…

Rings and Algebras · Mathematics 2019-06-18 Amir Hossein Nokhodkar

We study geometric structures arising from Hermitian forms on linear spaces over real algebras beyond the division ones. Our focus is on the dual numbers, the split-complex numbers, and the split-quaternions. The corresponding geometric…

Differential Geometry · Mathematics 2022-03-11 Hugo C. Botós

Quaternions were appeared through Lagrangian formulation of mechanics in Symplectic vector space. Its general form was obtained from the Clifford algebra, and Frobenius' theorem, which says that "the only finite-dimensional real division…

General Physics · Physics 2021-06-04 Sadataka Furui

A genuinely three-dimensional system, viz. the hyperbolic 4-sphere scattering system, is investigated with classical, semiclassical, and quantum mechanical methods at various center-to-center separations of the spheres. The efficiency and…

Chaotic Dynamics · Physics 2009-11-10 J. Main , E. Atilgan , H. S. Taylor , G. Wunner

In this paper the problem of finding a normal form of triangles and plane quadrilaterals up to similarity is considered. Several normal forms for triangles and a normal form for quadrilaterals of special case are described. Normal forms of…

Metric Geometry · Mathematics 2015-02-03 Peteris Daugulis , Vija Vagale

It is known that polynomials over quaternions may have spherical zeros and isolated left and right zeros. These zeros along with appropriately defined multiplicities form the zero structure of a polynomial. In this paper, we equivalently…

Rings and Algebras · Mathematics 2015-05-15 Vladimir Bolotnikov

This manuscript reviews theoretical results and applications related to quadratic forms in Gaussian random variables. It summarizes definitions, canonical representations, exact and approximate distributional results, numerical inversion…

Signal Processing · Electrical Eng. & Systems 2026-05-12 Mohanad Ahmed , Mahmoud Ghazal , Maaz Mahadi , Tareq Y. Al-Naffouri

Recently, Andrews, Hirschhorn and Sellers have proven congruences modulo 3 for four types of partitions using elementary series manipulations. In this paper, we generalize their congruences using arithmetic properties of certain quadratic…

Number Theory · Mathematics 2021-02-03 Jeremy Lovejoy , Robert Osburn

This paper develops a geometric model for coupled two-state quantum systems (qubits), which is formulated using geometric (aka Clifford) algebra. It begins by showing how Euclidean spinors can be interpreted as entities in the geometric…

Quantum Physics · Physics 2007-05-23 Timothy F. Havel , Chris J. L. Doran

In this paper, we give several matrix representations for the Horadam quaternions. We derive several identities related to these quaternions by using the matrix method. Since quaternion multiplication is not commutative, some of our results…

Number Theory · Mathematics 2019-10-10 Elif Tan , Ho-Hon Leung

A way to construct and classify the three dimensional polynomially deformed algebras is given and the irreducible representations is presented. for the quadratic algebras 4 different algebras are obtained and for cubic algebras 12 different…

Mathematical Physics · Physics 2007-05-23 Bindu A. Bambah

We give details of a formerly known relation between ternary quadratic forms and quaternion orders through the even Clifford algebra. Based on this and classifications of ternary quadratic forms we give a completely explicit classification…

Number Theory · Mathematics 2011-03-28 Stefan Lemurell