Johannesburg Johannesburg Johannesburg (; ; also known as Jozi, Joburg, and eGoli) is the largest city in South Africa and one of the 50 largest urban areas in the world. It is the provincial capital and largest city of Gauteng, which is the wealthiest province in South Africa. While Johannesburg is not one of South Africa's three capital cities, it is the seat of the Constitutional Court. The city is located in the mineral-rich Witwatersrand range of hills and is the centre of large-scale gold and diamond trade. The metropolis is an alpha global city as listed by the Globalization and
Cristian S. Calude Cristian S. Calude Cristian Sorin Calude (born 21 April 1952) is a Romanian-New Zealander mathematician and computer scientist. He graduated from the National College Vasile Alecsandri in Galați, and the University of Bucharest and was student of Grigore C. Moisil and Solomon Marcus. He is currently chair professor at the University of Auckland, New Zealand and also the founding director of the Centre for Discrete Mathematics and Theoretical Computer Science. Visiting Professor in many universities in Europe, North and South America, Australasia, South Africa, including Monbusho Visiting Professor, JAIST, 1999 and Visiting Professor ENS, Paris, 2009, École Polytechnique, Paris, 2011;