Endomorphism Rings of Projective Modules.
Endomorphism rings of regular modules over wild hereditary algebras
Let H be a connected wild hereditary path algebra. We prove that if Z is a quasi-simple regular brick, and [r]Z indecomposable regular of quasi-length r and with quasi-top Z, then .
Endomorphism rings of valued vector spaces
Endomorphisms and product bases of the Baer-Specker group.
Endotrivial modules over groups with quaternion or semi-dihedral Sylow 2-subgroup
Let be a finite group with a Sylow 2-subgroup which is either quaternion or semi-dihedral. Let be an algebraically closed field of characteristic 2. We prove the existence of exotic endotrivial -modules, whose restrictions to are isomorphic to the direct sum of the known exotic endotrivial -modules and some projective modules. This provides a description of the group of endotrivial -modules.
Energy estimate for wave equations with coefficients in some Besov type class.
Entwining Yang-Baxter maps and integrable lattices
Yang-Baxter (YB) map systems (or set-theoretic analogs of entwining YB structures) are presented. They admit zero curvature representations with spectral parameter depended Lax triples L₁, L₂, L₃ derived from symplectic leaves of 2 × 2 binomial matrices equipped with the Sklyanin bracket. A unique factorization condition of the Lax triple implies a 3-dimensional compatibility property of these maps. In case L₁ = L₂ = L₃ this property yields the set-theoretic quantum Yang-Baxter equation, i.e. the...
Epimorphic Extensions of Non-Commutative Rings
Épimorphismes de modules qui sont nécessairement des isomorphismes
Épimorphismes plats à buts locaux, quasi-locaux et semi-locaux
Epimorphisms of regular rings
Epis and monos which must be isos.
Equipped graphs and modular lattices attached to them
Equivalence of von Neumann regular and idempotent matrices
Equivalent Categories of Divisible Modules.
Equivariant brauergroups in algebraic number theory
Equivariant one-parameter deformations of associative algebra morphisms
We introduce equivariant formal deformation theory of associative algebra morphisms. We also present an equivariant deformation cohomology of associative algebra morphisms and using this we study the equivariant formal deformation theory of associative algebra morphisms. We discuss some examples of equivariant deformations and use the Maurer-Cartan equation to characterize equivariant deformations.
Erläuterungen zur Theorie der sogen. allgemeinen complexen Größen
Errata-Corrige : “Linearly compact rings and strongly quasi-injective modules”
Erratum - On the Bohr Compactification.