C. Froeschle et E. Lega, TWIST ANGLES - A METHOD FOR DISTINGUISHING ISLANDS, TORI AND WEAK CHAOTIC ORBITS - COMPARISON WITH OTHER METHODS OF ANALYSIS, Astronomy and astrophysics, 334(1), 1998, pp. 355-362
Using the standard map as a model problem we have investigated the met
hod of the twist angles (Contopoulos and Voglis 1997) to distinguish i
slands tori and weak chaotic orbits. In the case of regular orbits, we
have shown the relationship with the frequency studying in particular
the case of second order resonances. We have tested the sensitivity o
f the method comparing it to the frequency analysis, the sup-map analy
sis and the fast Lyapunov indicator.