fast_lyapunov_max¶
-
gala.dynamics.nonlinear.
fast_lyapunov_max
(w0, hamiltonian, dt, n_steps, d0=1e-05, n_steps_per_pullback=10, noffset_orbits=2, t1=0.0, atol=1e-10, rtol=1e-10, nmax=0, return_orbit=True)[source]¶ Compute the maximum Lyapunov exponent using a C-implemented estimator that uses the DOPRI853 integrator.
- Parameters
- w0
PhaseSpacePosition
, array_like Initial conditions.
- hamiltonian
Hamiltonian
- dtnumeric
Timestep.
- n_stepsint
Number of steps to run for.
- d0numeric (optional)
The initial separation.
- n_steps_per_pullbackint (optional)
Number of steps to run before re-normalizing the offset vectors.
- noffset_orbitsint (optional)
Number of offset orbits to run.
- t1numeric (optional)
Time of initial conditions. Assumed to be t=0.
- return_orbitbool (optional)
Store the full orbit for the parent and all offset orbits.
- w0
- Returns
- LEs
Quantity
Lyapunov exponents calculated from each offset / deviation orbit.
- orbit
Orbit
(optional)
- LEs