Autor: D. P. Sullivan

The Hauptvermutung is the conjecture that any two triangulations of a poly- hedron are combinatorially equivalent. The conjecture was formulated at the turn of the century, and until its resolution w …

A Survey of Megaliths and Mark Stones – Past and Present: This guide to old stones in the Cotswolds and Forest of Dean is designed for the curious, the megalith hunter, walker and antiquary alike. It …