CRLS 4th and "Discrete Mathematics and Its Applications" (DMIA) 8th book notes and solutions (Also with mcs_2018.pdf and The Algorithm Design Manual) ...

The problems involve mathematical tools called Lyapunov functions, named after mathematician Aleksandr Lyapunov, which analyse whether a system will remain stable over time, meaning its behaviour ...

A strange pattern running through the equations of physics may reveal something fundamental about the universe or could be a sign that human brains are biased to ignore more complex explanations ...