English: Graphical demonstration of sensitivity to initial conditions in the chaotic map defined by ${\displaystyle x\mapsto 4\cdot x\cdot (1-x)}$ and ${\displaystyle y\mapsto \left\{{\begin{array}{ll}x+y&{\text{ if }}x+y<1\\x+y-1&{\text{ otherwise}}\\\end{array}}\right.}$ .