In the late 19th century, Karl Weierstrass invented a fractal-like function that was decried as nothing less than a “deplorable evil.” In time, it would transform the foundations of mathematics.

As the name implies, the derivimeter finds the derivative of a function. To do that, you have to plot the function on a piece of paper that the meter can measure. If you forgot calculus or skipped ...

Derivatives are financial instruments whose value is derived from one or more underlying assets or securities (e.g., a stock, bond, currency, or index). A derivative is a contract that derives its ...