Accelerated plane-wave destruction

Theory

iter0,iter1,iter2
Figure 1. The iterative results of Newton's algorithm. The initial point is $p_0=0$ (solid circle), and the convergence result is marked by a blank circle: (a) when $D\leq 0$, (b) when $D>0$ and $a_1a_2>0$, (c) when $D>0$ and $a_1a_2<0$.