Geometry of Riccati equations over normed division algebras

Riemannian Geometry over different Normed Division Algebras

We develop a unifed theory to study geometry of manifolds with different holonomy groups. They are classified by (1) real, complex, quaternion or octonion number they are defined over and (2) being special or not. Specialty is an orientation with respect to the corresponding normed algebra A. For example, special Riemannian A-manifolds are oriented Riemannian, Calabi-Yau, Hyperkähler and G2-man...

Triangulaizability of Algebras Over Division Rings

triangulaizability of algebras over division rings

Normed division algebras with R: introducing the onion package

where multiplication is denoted by juxtaposition; note the absence of associativity. A division algebra is a nontrivial algebra in which division is possible: for any a ∈ V and any nonzero b ∈ V , there exists precisely one element x with a = bx and precisely one element y with a = yb. A normed division algebra is a division algebra with a norm ||·|| satisfying ||xy|| = ||x|| ||y||. There are p...

Algebraic Geometry over Lie Algebras

What is algebraic geometry over algebraic systems? Many important relations between elements of a given algebraic system A can be expressed by systems of equations over A. The solution sets of such systems are called algebraic sets over A. Algebraic sets over A form a category, if we take for morphisms polynomial functions in the sense of Definition 6.1 below. As a discipline, algebraic geometr...