Gelfand-Kirillov dimension in some crossed products.
Gelfand-Kirillov Dimensions of a Tensor Product.
General sheaves over weighted projective lines
We develop a theory of general sheaves over weighted projective lines. We define and study a canonical decomposition, analogous to Kac's canonical decomposition for representations of quivers, study subsheaves of a general sheaf, general ranks of morphisms, and prove analogues of Schofield's results on general representations of quivers. Using these, we give a recursive algorithm for computing properties of general sheaves. Many of our results are proved in a more abstract setting, involving a hereditary...
Generalization of a theorem of Siegel
Generalizations of coatomic modules
For a ring R and a right R-module M, a submodule N of M is said to be δ-small in M if, whenever N+X=M with M/X singular, we have X=M. Let ℘ be the class of all singular simple modules. Then δ(M)=Σ{ L≤ M| L is a δ-small submodule of M} = Re jm(℘)=∩{ N⊂ M: M/N∈℘. We call M δ-coatomic module whenever N≤ M and M/N=δ(M/N) then M/N=0. And R is called right (left) δ-coatomic ring if the right (left) R-module R R(RR) is δ-coatomic. In this note, we study δ-coatomic modules and ring. We prove M=⊕i=1n Mi...
Generalizations of Hopfian and co-Hopfian modules.
Generalizations of morphic group rings.
Generalizations of principally quasi-injective modules and quasiprincipally injective modules.
Generalizations of the primitive element theorem.
Generalized adjoint semigroups of a ring.
Generalized Baer rings.
Generalized Brauer tree orders
Generalized canonical algebras and standard stable tubes
We introduce a new wide class of finite-dimensional algebras which admit families of standard stable tubes (in the sense of Ringel [17]). In particular, we prove that there are many algebras of arbitrary nonzero (finite or infinite) global dimension whose Auslander-Reiten quivers admit faithful standard stable tubes.
Generalized coil enlargements of algebras
Generalized derivations acting on multilinear polynomials in prime rings
Generalized derivations and commutativity of rings with involution.
Generalized derivations associated with Hochschild 2-cocycles on some algebras
We investigate a new type of generalized derivations associated with Hochschild 2-cocycles which was introduced by A. Nakajima. We show that every generalized Jordan derivation of this type from CSL algebras or von Neumann algebras into themselves is a generalized derivation under some reasonable conditions. We also study generalized derivable mappings at zero point associated with Hochschild 2-cocycles on CSL algebras.
Generalized derivations of prime rings.
Generalized derivations on Lie ideals in prime rings
Let be a prime ring with its Utumi ring of quotients and extended centroid . Suppose that is a generalized derivation of and is a noncentral Lie ideal of such that for all , where is a fixed integer. Then one of the following holds:
Generalized Derivations on (Semi-)Prime Rings and Noncommutative Banach Algebras