In case you can't fall asleep, don't indulge in caffeine. These problems by Arnold(PDF) will do the job. Trembling is the very opening of Arnold's trivium: "The standard of mathematical culture is failing..." Download PDF here, courtesy of Montana Uni.
Paper crumpling is memory-less, which implies reduced complexity with hopes that other perceivable complex phenomena are ultimately simple to describe. by @sioroberts via @nytimes #math #physics #complexity #chaos #statevariables
Prof. Giacomo Bonanno has released a book on game theory under CC-NC-ND and another one on decision making. (Hat tip to @mathematicsprof for the tweet.) PDFs available for download. #GameTheory #openaccess #books #math