Physics and Python stuff. Most of the videos here are either adapted from class lectures or solving physics problems. I really like to use numerical calculations without all the fancy programming ...

Almost periodic functions serve as a powerful conceptual framework in analysing differential equations whose coefficients or forcing terms exhibit recurrent behaviour over time.

The result is a pen-plot graph of the solution to the input equation, input by displacing a rod as a function of time. Differential analyzers have been around for over a century.