A new class of methods, termed "group explicit methods," is introduced in this text. Their applications to solve parabolic, hyperbolic and elliptic equations are outlined, and the advantages for their implementation on parallel computers clearly portrayed. Also included are the introductory and fundamental concepts from which the new methods are derived, and on which they are dependent. With the increasing advent of parallel computing into all aspects of computational mathematics, there is no doubt that the new methods will be widely used.

There are many hundreds of stone circles around Britain. Most were built in the Late Neolithic or early Bronze Age eras and can be found throughout England, Wales and Scotland, although there are concentrations in the more remote and upland areas. It is not known for certain why they were built but they are believed to have a ritual or ceremonial purpose and are often aligned to the sun or moon and many were also burial sites. In this book author Cozmic Dave surveys the stone circles of Britain. He travels from Scotland, to Wales and England, and surveys not only the famous sites of Stonehenge and Avebury but many other stone circles throughout Britain. From Orkney and the Hebrides and the Scottish mainland, to Northern England including the Lake District, Wales, the heart of England and the South Western counties of England, the huge variety of stone circles around Britain are revealed. This fascinating picture of this important legacy from the prehistory of Britain will be of interest to all those who have seen and visited these mysterious structures around England, Scotland and Wales.

Presenting the main recent advances made in parallel processing, this volume focuses on the design and implementation of systolic algorithms as efficient computational structures that encompass both multiprocessing and pipelining concepts.;While the architecture of present-day parallel supercomputers is largely based on the concept of a shared memory, with its attendant limitations of common access, advances in semiconductor technology have led to the development of highly parallel computer architectures with decentralized storage and limited connections in which each processor possesses high bandwidth local memory connected to a small number of neighbours. Systolic arrays are a typical and highly efficient example of such architectures, enabling cost effective, high-speed parallel processing for large volumes of data, with ultra-high throughput rates. Algorithms suitable for implementation on systolic arrays find applications in areas such as signal and image processing, pattern matching, linear algebra, recurrence algorithms and graph problems.