Calculate algebraic series such as e = 1+ 1/2! + 1/3! + …, a square wave, Fibonacci numbers. Study iterative maps, e.g. the (one-dimensional) Logistic map: (see below) or more complicated multi-dimensional maps. The logistic map is perhaps one of the simplest mathematical system showing many characteristics of the development of chaotic behavior.
Several analytical tools are valuable to study the results of Iterations and ODE’s such as:
Time series | Power spectra | 2D projections | Fixed points | Lyapunov exponents
A special window has been added in Mathgrapher v2 to allow detailed presentation of 2D orbits at the pixel level and to study the stability of the orbits (see the Examples and Demonstrations for the Henon map, Standard map and Mandelbrot and Julia sets.
Series representation of square wave
Define F1=F2 and F2=F1+sin((2n+1)x)/(2n-1) with initial values 0.
Vary one parameter in the Iteration type panel. Vary x and do 50 iterations (N=50) for 200 values of x ranging from -5 to 15. This yields the following graph (this is also shown in one of the demonstrations)