Attrac This software uses innovative techniques to achieve 3-D visualisation of the point sets known as Strange Attractors resulting from iteration of non-linear maps on points in Euclidean Space. Instructions 'm' -> output transform matrix 'p' -> output current point 'f' -> output frames elapsed 'r' -> post redisplay ' ' -> reset transform matrix 'c' -> randomise coefficients 's' -> select next Sprott code from list 'e' -> Enter a Sprott code on the command line ESC -> exit <left mouse button> -> drag mouse to translate in XY plane <middle mouse button> -> drag mouse to scale <right mouse button> -> drag mouse to rotate around X and Y axes Ruben Henner Zilibowitz