Hecke Algebras, SVD, and Other Computational Examples with {\sc CLIFFORD}
| dc.creator | Ablamowicz, Rafal | |
| dc.date | 1999-10-14 | |
| dc.date.accessioned | 2026-07-07T05:31:09Z | |
| dc.date.available | 2026-07-07T05:31:09Z | |
| dc.description | {\sc CLIFFORD} is a Maple package for computations in Clifford algebras $\cl (B)$ of an arbitrary symbolic or numeric bilinear form B. In particular, B may have a non-trivial antisymmetric part. It is well known that the symmetric part g of B determines a unique (up to an isomorphism) Clifford structure on $\cl(B)$ while the antisymmetric part of B changes the multilinear structure of $\cl(B).$ As an example, we verify Helmstetter's formula which relates Clifford product in $\cl(g)$ to the Clifford product in $\cl(B).$ Experimentation with Clifford algebras $\cl(B)$ of a general form~B is highly desirable for physical reasons and can be easily done with {\sc CLIFFORD}. One such application includes a derivation of a representation of Hecke algebras in ideals generated by q-Young operators. Any element (multivector) of $\cl(B)$ is represented in Maple as a multivariate Clifford polynomial in the Grassmann basis monomials although other bases, such as the Clifford basis, may also be used. Using the well-known isomorphism between simple Clifford algebras $\cl(Q)$ of a quadratic form Q and matrix algebras through a faithful spinor representation, one can translate standard matrix algebra problems into the Clifford algebra language. We show how the Singular Value Decomposition of a matrix can be performed in a Clifford algebra. Clifford algebras of a degenerate quadratic form provide a convenient tool with which to study groups of rigid motions in robotics. With the help from {\sc CLIFFORD} we can actually describe all elements of $\Pin(3)$ and $\Spin(3).$ Rotations in $\BR^3$ can then be generated by unit quaternions realized as even elements in $\cl^{+}_{0,3}.$ Throughout this work all symbolic computations are performed with {\sc CLIFFORD} and its extensions. | |
| dc.description | 49 pages, LaTeX2e, Makro98.tex, Maple style files. Extended version of talk presented at ``ACACSE'99:Applied Clifford Algebra in Cybernetics, Robotics, Image Processing and Engineering'', 5th International Conference on Clifford Algebras and their Applications in Mathematical Physics, June 27-July 4, 1999, Ixtapa, Zihuatanejo, Mexico | |
| dc.identifier | https://arxiv.org/abs/math/9910069 | |
| dc.identifier | http://arxiv.org/abs/math/9910069 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/79237 | |
| dc.subject | Rings and Algebras | |
| dc.subject | 11E88,15A66,15A75,15A63,65F15 | |
| dc.title | Hecke Algebras, SVD, and Other Computational Examples with {\sc CLIFFORD} | |
| dc.type | text |