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For some monoids, we give a method of composing invertibility preserving maps associated to "partial involutions." Also, we define the notion of "determinants for finite dimensional algebras over a field." As examples, we give invertibility…

Rings and Algebras · Mathematics 2023-03-03 Naoya Yamaguchi , Yuka Yamaguchi

A signature epsilon=(p,q) dependent transposition anti-involution T of real Clifford algebras Cl_{p,q} for non-degenerate quadratic forms was introduced in [arXiv.1005.3554v1]. In [arXiv.1005.3558v1] we showed that, depending on the value…

Mathematical Physics · Physics 2011-02-17 Rafal Ablamowicz , Bertfried Fauser

A complete classification is given of all inner actions on the Clifford algebra C(1,3) defined by representations of the quantum group GL_q(2,C), q^m\neq 1, which are not reduced to representations of two commuting "q-spinors". As a…

Quantum Algebra · Mathematics 2007-05-23 V. K. Kharchenko , Jaime Keller , S. Rodriguez-Romo

We present different methods for symbolic computer algebra computations in higher dimensional (\ge9) Clifford algebras using the \Clifford\ and \Bigebra\ packages for \Maple(R). This is achieved using graded tensor decompositions,…

Mathematical Physics · Physics 2012-06-19 Rafal Ablamowicz , Bertfried Fauser

I apply the algebraic framework developed in arXiv:1101.4542 to study geometry of elliptic spaces in 1, 2, and 3 dimensions. The background material on projectivised Clifford algebras and their application to Cayley-Klein geometries is…

Metric Geometry · Mathematics 2013-10-11 Andrey Sokolov

In this paper, we present two fast matrix representation algorithms based on the recursive decomposition of multivectors into specific right and left ideals. We also examine the relation between these two representations. Furthermore, we…

Rings and Algebras · Mathematics 2024-10-10 Gleb Rumyantsev

It is well-known that the Clifford algebra Cl(2n) can be given a description in terms of creation/annihilation operators acting in the space of inhomogeneous differential forms on C^n. We refer to such inhomogeneous differential forms as…

Mathematical Physics · Physics 2022-05-11 Niren Bhoja , Kirill Krasnov

A concrete representation of the Clifford algebra (for any hyperbolic quadratic space) is given using what are called Suslin matrices. This explicit construction is used to analyze the corresponding Spin groups and the involution and might…

Rings and Algebras · Mathematics 2020-12-17 Vineeth Chintala

In this Master of Science Thesis I introduce geometric algebra both from the traditional geometric setting of vector spaces, and also from a more combinatorial view which simplifies common relations and operations. This view enables us to…

Rings and Algebras · Mathematics 2008-11-07 Douglas Lundholm

We use isomorphism $\varphi$ between matrix algebras and simple orthogonal Clifford algebras $\cl(Q)$ to compute matrix exponential ${e}^{A}$ of a real, complex, and quaternionic matrix A. The isomorphic image $p=\varphi(A)$ in $\cl(Q),$…

Mathematical Physics · Physics 2015-06-26 Rafal Ablamowicz

Real physical systems with reflective and rotational symmetries such as viruses, fullerenes and quasicrystals have recently been modeled successfully in terms of three-dimensional (affine) Coxeter groups. Motivated by this progress, we…

Mathematical Physics · Physics 2016-07-13 Pierre-Philippe Dechant

This paper is meant to be an informative introduction to spinor representations of Clifford algebras. In this paper we will have a look at Clifford algebras and the octonion algebra. We begin the paper looking at the quaternion algebra…

Representation Theory · Mathematics 2019-06-28 Ricardo Suarez

The well-known classification of the Clifford algebras $Cl(r,s)$ leads to canonical forms of complex and real representations which are essentially unique by virtue of the Wedderburn theorem. For $s\ge 1$ representations of $Cl(r,s)$ on…

Mathematical Physics · Physics 2007-05-23 Ayse H. Bilge , Sahin Kocak , Selman Uguz

There has been recent interest in novel Clifford geometric invariants of linear transformations. This motivates the investigation of such invariants for a certain type of geometric transformation of interest in the context of root systems,…

Machine Learning · Computer Science 2024-05-28 Siqi Chen , Pierre-Philippe Dechant , Yang-Hui He , Elli Heyes , Edward Hirst , Dmitrii Riabchenko

We use our Clifford algebra technique, that is nilpotents and projectors which are binomials of the Clifford algebra objects $\gamma^a$ with the property $\{\gamma^a,\gamma^b\}_+ = 2 \eta^{ab}$, for representing quantum gates and quantum…

Quantum Physics · Physics 2009-11-13 M. Gregoric , N. S. Mankoc Borstnik

In previous work, we associated to $\textrm{SU(3)}$, $\mathrm{G}_2$, and $\textrm{Spin(7)}$-structures minimal left ideals for the Clifford algebras $\mathbb{R}_{0,6},\mathbb{R}_{0,7}$, and $\mathbb{R}_{0,8}$, respectively. In this paper,…

Differential Geometry · Mathematics 2025-11-11 Ricardo Suárez

Quaternionic representations of Coxeter (reflection) groups of ranks 3 and 4, as well as those of E_8, have been used extensively in the literature. The present paper analyses such Coxeter groups in the Clifford Geometric Algebra framework,…

Mathematical Physics · Physics 2013-07-26 Pierre-Philippe Dechant

It shown that if a vector space carries commuting actions of two Clifford algebras, then the quadratic monomials using generators from either Clifford algebra determine a spinor representation of an orthogonal Lie algebra. Examples of this…

Mathematical Physics · Physics 2024-10-29 John W. Barrett

This chapter provides a comprehensive survey of foundational results and recent advances concerning minimal generating sets for the mapping class group of a nonorientable surface, $\mathrm{Mod}(N_{g})$, and its index-two twist subgroup,…

Geometric Topology · Mathematics 2025-11-24 Tulin Altunoz , Mehmetcik Pamuk , Oguz Yildiz

Commutative analogues of Clifford algebras are algebras defined in the same way as Clifford algebras except that their generators commute with each other, in contrast to Clifford algebras in which the generators anticommute. In this paper,…

Rings and Algebras · Mathematics 2025-10-03 Heerak Sharma , Dmitry Shirokov