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Expand Up @@ -7,102 +7,102 @@ These Python programs can be downloaded from GitHub at



DWH.py:
Biased double well.
* DWH.py:
* Biased double well.

DampedDriven.py:
Driven-damped oscillators. Options are: driven-damped pendulum and driven-damped double well potential. Plots a two-dimensional Poincaré section.
* DampedDriven.py:
* Driven-damped oscillators. Options are: driven-damped pendulum and driven-damped double well potential. Plots a two-dimensional Poincaré section.

DoublePendulum.py:
Double pendulum. (See: https://galileo-unbound.blog/2020/10/18/the-ups-and-downs-of-the-compound-double-pendulum/)
* DoublePendulum.py:
* Double pendulum. (See: https://galileo-unbound.blog/2020/10/18/the-ups-and-downs-of-the-compound-double-pendulum/)

Duffing.py:
Duffing oscillator.
* Duffing.py:
* Duffing oscillator.

FlipPhone.py:
Flipping iPhone simulator. (See https://galileo-unbound.blog/2021/10/10/physics-of-the-flipping-iphone-and-the-fate-of-the-earth/.)
* FlipPhone.py:
* Flipping iPhone simulator. (See https://galileo-unbound.blog/2021/10/10/physics-of-the-flipping-iphone-and-the-fate-of-the-earth/.)

Flow2D.py:
Simple flows for 2D autonomous dynamical systems. Options are: Medio, van der Pol, and Fitzhugh-Nagumo models.
* Flow2D.py:
* Simple flows for 2D autonomous dynamical systems. Options are: Medio, van der Pol, and Fitzhugh-Nagumo models.

Flow2DBorder.py:
Same as Flow2D.py but with initial conditions set on the boarder of the phase portrait.
* Flow2DBorder.py:
* Same as Flow2D.py but with initial conditions set on the boarder of the phase portrait.

Flow3D.py:
Flows for 3D autonomous dynamical systems. Options are: Lorenz, Rössler and Chua’s Circuit.
* Flow3D.py:
* Flows for 3D autonomous dynamical systems. Options are: Lorenz, Rössler and Chua’s Circuit.

GravSynch.py:
Synchronization of clocks in a spaceship near a black hole. (See: https://galileo-unbound.blog/2021/05/16/locking-clocks-in-strong-gravity/)
* GravSynch.py:
* Synchronization of clocks in a spaceship near a black hole. (See: https://galileo-unbound.blog/2021/05/16/locking-clocks-in-strong-gravity/)

gravlens.py:
Gravitational lensing. (See: https://galileo-unbound.blog/2021/04/05/the-lens-of-gravity-einsteins-rings/)
* gravlens.py:
* Gravitational lensing. (See: https://galileo-unbound.blog/2021/04/05/the-lens-of-gravity-einsteins-rings/)

Hamilton4D.py:
Hamiltonian flows for 4D autonomous systems. Options are: Henon-Heiles potential, and the crescent potential. Plots a two-dimensional Poincaré section.
* Hamilton4D.py:
* Hamiltonian flows for 4D autonomous systems. Options are: Henon-Heiles potential, and the crescent potential. Plots a two-dimensional Poincaré section.

Heiles.py:
Henon-Heiles and also a crescent model
* Heiles.py:
* Henon-Heiles and also a crescent model

HenonHeiles.py:
Standalone Henon-Heiles model.
* HenonHeiles.py:
* Standalone Henon-Heiles model.

Hill.py:
Hill potentials for 3-body problem. (See: https://galileo-unbound.blog/2019/07/19/getting-armstrong-aldrin-and-collins-home-from-the-moon-apollo-11-and-the-three-body-problem/)
* Hill.py:
* Hill potentials for 3-body problem. (See: https://galileo-unbound.blog/2019/07/19/getting-armstrong-aldrin-and-collins-home-from-the-moon-apollo-11-and-the-three-body-problem/)

Kuramoto.py:
Kuramoto synchronization of phase oscillators on a complete graph.
* Kuramoto.py:
* Kuramoto synchronization of phase oscillators on a complete graph.

logistic.py:
Logistic discrete map, plus some other choices.
* logistic.py:
* Logistic discrete map, plus some other choices.

Lozi.py:
Discrete iterated Lozi map conserves volume.
* Lozi.py:
* Discrete iterated Lozi map conserves volume.

NetDynamics.py:
Coupled phase oscillators on various network topologies. Has more options than coupleNdriver.py.
* NetDynamics.py:
* Coupled phase oscillators on various network topologies. Has more options than coupleNdriver.py.

NetSIR.py:
SIR viral infection model on networks
* NetSIR.py:
* SIR viral infection model on networks

NetSIRS.py:
SIRS viral infection model on networks
* NetSIRS.py:
* SIRS viral infection model on networks

PenInverted.py:
Inverted pendulum. (See: https://galileo-unbound.blog/2020/09/14/up-side-down-physics-dynamic-equilibrium-and-the-inverted-pendulum/)
* PenInverted.py:
* Inverted pendulum. (See: https://galileo-unbound.blog/2020/09/14/up-side-down-physics-dynamic-equilibrium-and-the-inverted-pendulum/)

Perturbed.py:
Driven undampded oscillators with a plane-wave perturbation. Options are: pendulum and double-well potential. These are driven nonlinear Hamiltonian systems. When driven at small perturbation amplitude near the separatrix, chaos emerges. These systems do not conserve energy, because there is a constant input and output of energy as the system reacts against the drive force. Plots a two-dimensional Poincaré section.
* Perturbed.py:
* Driven undampded oscillators with a plane-wave perturbation. Options are: pendulum and double-well potential. These are driven nonlinear Hamiltonian systems. When driven at small perturbation amplitude near the separatrix, chaos emerges. These systems do not conserve energy, because there is a constant input and output of energy as the system reacts against the drive force. Plots a two-dimensional Poincaré section.

raysimple.py:
Eikonal equation simulator. (See: https://galileo-unbound.blog/2019/05/30/the-iconic-eikonal-and-the-optical-path/)
* raysimple.py:
* Eikonal equation simulator. (See: https://galileo-unbound.blog/2019/05/30/the-iconic-eikonal-and-the-optical-path/)

SIR.py:
SIR homogeneous COVID-19 model (See: https://galileo-unbound.blog/2020/03/22/physics-in-the-age-of-contagion-the-bifurcation-of-covid-19/)
* SIR.py:
* SIR homogeneous COVID-19 model (See: https://galileo-unbound.blog/2020/03/22/physics-in-the-age-of-contagion-the-bifurcation-of-covid-19/)

SIRS.py:
SIRS homogeneous COVID-19 model (See: https://galileo-unbound.blog/2020/07/20/physics-in-the-age-of-contagion-part-4-fifty-shades-of-immunity-to-covid-19/)
* SIRS.py:
* SIRS homogeneous COVID-19 model (See: https://galileo-unbound.blog/2020/07/20/physics-in-the-age-of-contagion-part-4-fifty-shades-of-immunity-to-covid-19/)

SIRWave.py:
Covid-19 second wave model (See:https://galileo-unbound.blog/2020/04/06/physics-in-the-age-of-contagion-part-2-the-second-wave-of-covid-19/)
* SIRWave.py:
* Covid-19 second wave model (See:https://galileo-unbound.blog/2020/04/06/physics-in-the-age-of-contagion-part-2-the-second-wave-of-covid-19/)

StandMap.py:
The Chirikov map, also known as the standard map, is a discrete itereated map with winding numbers and islands of stability.
* StandMap.py:
* The Chirikov map, also known as the standard map, is a discrete itereated map with winding numbers and islands of stability.

StandMapHom.py:
Homoclinic tangle for the standard map.
* StandMapHom.py:
* Homoclinic tangle for the standard map.

StandMapTwist.py:
The Standard Map in twist format (See: https://galileo-unbound.blog/2019/10/14/how-number-theory-protects-you-from-the-chaos-of-the-cosmos/)
* StandMapTwist.py:
* The Standard Map in twist format (See: https://galileo-unbound.blog/2019/10/14/how-number-theory-protects-you-from-the-chaos-of-the-cosmos/)

trirep.py:
Replicator dynamics in 3D simplex format.
* trirep.py:
* Replicator dynamics in 3D simplex format.

UserFunction.py:
Growing library of user functions
* UserFunction.py:
* Growing library of user functions
linfit.py – linear regression function

WebMap.py:
The discrete map of a periodically kicked oscillator displays a web of dynamics. (See: https://galileo-unbound.blog/2018/10/27/how-to-weave-a-tapestry-from-hamiltonian-chaos/)
* WebMap.py:
* The discrete map of a periodically kicked oscillator displays a web of dynamics. (See: https://galileo-unbound.blog/2018/10/27/how-to-weave-a-tapestry-from-hamiltonian-chaos/)

(Selected Python programs can be found at the Galileo Unbound Blog Site:
https://galileo-unbound.blog/tag/python-code/)
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