By Alexander Altland (Universitat zu Koeln), Jan von Delft (Ludwig-Maximilians-Universitat Munchen)
By Jacques Derrida, John P. Leavey
By Heinz-Otto Peitgen, Hartmut Jurgens, Dietmar Saupe, Evan M. Maletsky, Terry Perciante
By Tim Wegner, Mark Peterson, Bert Tyler
By Heinz-Otto Peitgen, Hartmut Jurgens, Dietmar Saupe
By Nathan Jacobson
By Linzi Henry
By The Math Forum
By Alfred S. Posamentier, Ingmar Lehmann
By Euclid, Thomas L. Heath, Dana Densmore
By Mauro C. Beltrametti, Ettore Carletti, Dionisio Gallarati, Francis Sullivan
By Sherman K. Stein, Anthony Barcellos
By Kenneth Falconer (Professor of Pure Mathematics, University of St Andrews)
By Stefan Hildebrandt, Anthony Tromba
By H. Takayasu
By S. G. Hoggar (University of Glasgow)
By Jeremy Gray
By Juliusz Brzezinski
By James W. Anderson
By Andrew Baker
By Michael Field
By Sean Dineen
By Marc Hindry
By Jean-Claude Hausmann
By Mark J.D. Hamilton
By Alexandru Dimca
By Graham Everest, Thomas Ward
By David A. Brannan (The Open University, Milton Keynes), Matthew F. Esplen (The Open University, Jeremy J. Gray (The Open University