Ordnungen von Quaternionenalgebren über lokalen Körpern.
Ordres de Gorenstein
Ore extensions over near pseudo-valuation rings.
Ore sets in enveloping algebras
Orthodox bands of modules
Orthogonal Gelfand-Zetlin algebras. I.
Orthogonal generalized -derivations of semiprime rings.
Orthogonality-preserving transformations on quadratic spaces
Orthogonally complete alternative rings.
Orthorings
Certain ring-like structures, so-called orthorings, are introduced which are in a natural one-to-one correspondence with lattices with 0 every principal ideal of which is an ortholattice. This correspondence generalizes the well-known bijection between Boolean rings and Boolean algebras. It turns out that orthorings have nice congruence and ideal properties.
Ostrwoski's theorem for Henselian valued skew fields.
Outer automorphisms of endomorphism algebras
Commutative rings over which no endomorphism algebra has an outer automorphism are studied.
Over-rings of an (HNP)-ring
-clean rings.
near-rings.
Parameterabhängige nichtkommutative Distributionenalgebren
Parametric representations of BiHom-Hopf algebras
The main purpose of the present paper is to study representations of BiHom-Hopf algebras. We first introduce the notion of BiHom-Hopf algebras, and then discuss BiHom-type modules, Yetter-Dinfeld modules and Drinfeld doubles with parameters. We get some new -monoidal categories via the category of BiHom-(co)modules and the category of BiHom-Yetter-Drinfeld modules. Finally, we obtain a center construction type theorem on BiHom-Hopf algebras.
Partial flag varieties and preprojective algebras
Let be a preprojective algebra of type , and let be the corresponding semisimple simply connected complex algebraic group. We study rigid modules in subcategories for an injective -module, and we introduce a mutation operation between complete rigid modules in . This yields cluster algebra structures on the coordinate rings of the partial flag varieties attached to .
Partial isometries and EP elements in rings with involution.
Partial orders in semigroups and semirings of right quotients.