Jacques Hadamard proved that this property occurs with a free particle moving on a compact Riemann surface of genus 2, called a Bolza surface. A system with this property cannot flip if the quantity [read slowly] “3 times cosine of theta-1 plus cosine of theta-2” is at least 2. This property is exhibited by a circuit containing a diode that has (-5[1])nonlinear negative resistance. In systems with this property, points lying in a basin of attraction converge (10[1])to a strange attractor. This property is characterized by a positive Lyapunov exponent and is indicated by a period-doubling (10[1])bifurcation. This property is exhibited (10[1])by the logistic map and double pendulum. For 10 (10[1])points, name this (10[1])property in which a system is extremely sensitive to initial conditions, which results in a “butterfly effect.” ■END■ (10[1])