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[2] viXra:2401.0058 [pdf] replaced on 2024-10-17 10:18:28
Authors: Eckhard Hitzer
Comments: 15 Pages. Accepted for publication by Adv. Appl. Clifford Algebras, Oct. 2024.
We compute and explore the full geometric product of two oriented points in conformal geometric algebra Cl(4,1) of three-dimensional Euclidean space. We comment on the symmetry of the various components, and state for all expressions also a representation in terms of point pair center and radius vectors.
Category: Algebra
[1] viXra:2401.0011 [pdf] replaced on 2026-01-05 20:18:09
Authors: Teo Banica
Comments: 400 Pages.
This is an introduction to linear algebra and group theory. We first review the linear algebra basics, namely the determinant, the diagonalization procedure and more, and with the determinant being constructed as it should, as a signed volume. We discuss then the basic applications of linear algebra to questions in analysis. Then we get into the study of the closed groups of unitary matrices $Gsubset U_N$, with some basic algebraic theory, and with a number of probability computations, in the finite group case. In the general case, where $Gsubset U_N$ is compact, we explain how the Weingarten integration formula works, and we present some basic $Ntoinfty$ applications.
Category: Algebra
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