We investigate the behavior of finitely generated projective modules over a down-up algebra. Specifically, we show that every noetherian down-up algebra A(α,β,γ) has a non-free, stably free right ideal. Further, we compute ...

Many rings and algebras arising in quantum mechanics, algebraic analysis, and non-commutative algebraic geometry can be interpreted as skew PBW (Poincare- Birkhoff Witt) extensions. In the present paper we study two aspects ...

In this paper we introduce the Quillen-Suslin rings and investigate its relation with some other classes of rings as Hermite rings (each stably free module is free), PSF rings (each finitely generated projective module is ...

In this monograph, we study finitely generated projective modules defined on a certain type of noncommutative rings, called σ−P BW extensions, also known as skew P BW extensions. This class of noncommutative rings of ...

Resonant interactions among equatorial waves in the presence of a diurnally varying heat source are studied in the context of the diabatic version of the equatorial beta-plane primitive equations for a motionless, hydrostatic, ...

Las células son dispositivos de procesamiento de información, que integran millones de señales extracelulares e intracelulares para producir una respuesta celular óptima dentro de un organismo. Muchas enfermedades, por ...

Esta tesis trata los modelos de morfogénesis, en particular los modelos de evolución guiada por contacto que son coherentes con la hipótesis de la adhesión diferencial. Se presenta una revisión de algunos modelos, sus ...

Boundary-Layer Meteorology refers to the theoretical, numerical, and experimental framework that focuses on studying the interactions between the earth's surface and the lower troposphere. These interactions are crucial ...