Peter Topping – författare

Hamilton's Ricci flow has attracted considerable attention since its introduction in 1982, owing partly to its promise in addressing the Poincaré conjecture and Thurston's geometrization conjecture. This book gives a concise introduction to the subject with the hindsight of Perelman's breakthroughs from 2002/2003. After describing the basic properties of, and intuition behind the Ricci flow, core elements of the theory are discussed such as consequences of various forms of maximum principle, issues related to existence theory, and basic properties of singularities in the flow. A detailed exposition of Perelman's entropy functionals is combined with a description of Cheeger-Gromov-Hamilton compactness of manifolds and flows to show how a 'tangent' flow can be extracted from a singular Ricci flow. Finally, all these threads are pulled together to give a modern proof of Hamilton's theorem that a closed three-dimensional manifold whichcarries a metric of positive Ricci curvature is a spherical space form.

There have been some fine histories of Didsbury compiled over the last 150 years since the publication of A History of the Chapels of Didsbury & Chorlton by Revd John Booker in 1859. But now it is time for a new book, which does not attempt to revisit or repackage what already has been published but to do something different, viewing the history of Didsbury from another angle. Local painter and author Peter Topping and author and historian Andrew Simpson invite readers to dip into the pages of Didsbury Through Time to discover the changes that have occurred over the last century. Through a mix of old images paired with new, along with a selection of paintings by Peter himself, the lives of the people who lived behind the doors of Didsbury's fine buildings are uncovered.

From Mine to User: Production and Procurement Systems of Siliceous Rocks in the European Neolithic and Bronze Age presents the papers from Session XXXIII of the 18th UISPP World Congress (Paris, June 2018). 23 authors contribute nine papers from Parts 1 and 2 of the Session. The first session ‘Siliceous rocks: procurement and distribution systems’ was aimed at analysing one of the central research issues related to mining, i.e. the production systems and the diffusion of mining products. The impact of extraction on the environment, group mobility and the numbers involved in the exploitation phase were considered; mining products were also examined with a view to identifying local and imported/exported products and the underlying social organization relating to the different fields of activity. The second session ‘Flint mines and chipping floors from prehistory to the beginning of the nineteenth century’ focused on knapping activities. The significance of the identification of knapping workshops in the immediate vicinity of mine shafts and of their presence in villages as well as in intermediary places between the two was considered in the analysis of chaîne opératoire sequences. The potential of product quality and artefact distribution to contribute to the understanding of the social organisation of the communities being studied was also examined.

Reprint of another classic Neolithic Studies Group volume. 'It is a sign of the intellectual health of a specialist study group that its deliberations can generate collections of papers of general interest. The topical issue of landscape is addressed, although with the added complication of attempting to focus on the domestic as opposed to ceremonial aspects of Neolithic life'.