Helaman Ferguson explains his endless circle sculpture called 'Umbilic Torus' to mathematicians at the five-day International Congress on Industrial and Applied Mathematics being held in Sydney July 9, 2003. The continuous, donut-shaped surface of the bronze sculpture is created by Ferguson using mathematical patterns along with drills, saws, air hammers and power cutters. The congress is being attended by over 1600 delegates from 61 countries and is hoping to discuss ways of using mathematics to create better computers and increase our understanding of the human brain.