Institution: | 1. PeregrineQuant , 6th Floor, Letterstedt House, Fedsure on Main, Newlands 7700, South Africa;2. School of Economics , University of Cape Town , Rondebosch 7701, South Africa;3. Department of Mathematics and Applied Mathematics , University of Cape Town , Rondebosch 7701, South Africa E-mail: peter@maths.uct.ac.za |