Say “Old West six-gun” and most folks picture a single-action Colt on a cavalryman’s hip. That image isn’t wrong – but it’s ...

Abstract: We identify the nonlinear normal modes spawning from the stable equilibrium of a double pendulum under gravity, and we establish their connection to homoclinic orbits through the unstable ...

In the annals of American politics, few figures have reshaped the landscape as profoundly as President Donald Trump. His ...