Let R be the quotient of a regular coherent commutative ring by a finitely generated ideal. In this paper, we classify all abelian subcategories of finitely presented R-modules that are closed under extensions. We also classify abelian subcategories of arbitrary R-modules that are closed under extensions and coproducts, when R is commutative and Noetherian. The method relies on comparison with ...

Love-type wave generation in a fiber-reinforced medium placed over an inhomogeneous orthotropic half-space is analysed. The upper and lower boundary surfaces of the fiber reinforced medium are periodically corrugated. Inhomogeneity of half-space is caused by variable density and variable shear modules. Displacement components for layer and half-space are derived by applying separable variable t...

ABSTRACT. Let R be a commutative noetherian ring, I and J are two ideals of R. Inthis paper we introduce the concept of (I;J)- minimax R- module, and it is shown thatif M is an (I;J)- minimax R- module and t a non-negative integer such that HiI;J(M) is(I;J)- minimax for all i

When building large-scale goal-oriented models using the i* framework, the problem of scalability arises. Modules have been proposed to structure i* models into reusable and combinable fragments. In this work we present an implementation of the module concept over the jUCMNav tool.

In current business practice an integrated approach to represent at the design level the technological infrastructure that gives support to business processes is needed. We argue that it is highly complex considering technology in terms of specific functionalities from the beginning because these functionalities depend on new business requirements produced continually by internal and external c...