In most distributed memory MIMD multiprocessors, processors are connected by a point-to-point interconnection network. Since interprocessor communication frequently constitutes serious bottlenecks, several architectures were proposed that enhance point-to-point topolo-gies with the help of multiple bus systems so as to improve the communication eeciency. In this paper we study parallel architec...

In this paper we study curvature properties of semi - symmetric type of totally umbilical radical transversal lightlike hypersurfaces $(M,g)$ and $(M,widetilde g)$ of a K"ahler-Norden manifold $(overline M,overline J,overline g,overline { widetilde g})$ of constant totally real sectional curvatures $overline nu$ and $overline {widetilde nu}$ ($g$ and $widetilde g$ are the induced metrics on $M$...

We show that the trace formula interpretation of the explicit formulas expresses the counting function N(q) of the hypothetical curve C associated to the Riemann zeta function, as an intersection number involving the scaling action on the adèle class space. Then, we discuss the algebraic structure of the adèle class space both as a monoid and as a hyperring. We construct an extension Rconvex of...

Several architectures have been proposed to enhance point-to-point architectures with the addition of multiple bus systems. In particular, we consider an architecture for a massively parallel system where processors are connected solely by buses. These archi-tectures can use the power of bus technologies, providing a way to interconnect much more processors in a simple and eecient manner. In th...