This v2 is only up to date as far as November 2024. Excepting that its references were updated in December 2025.
Newsflash 2025: this article is being split into the body, keeping its original name, for Annals of the Institute of the Thery STEM. And its Appendix, to feature as a Review “Eigentheory in Detail: Real-Symmetric Subcase” for the Online Encyclopedia of Tensors and other Multi-linear Arrays…
2026 update: some of the links on this do not work on some people’s computers. With pages 2 to 6 serving as an introduction to our program of applying Linear Algebra in detail to Flat Geometry, we will patch this soon. For all that this will probably create a separated-off introduction to this program. Which would subsequently evolve separately from the current Article…
