DECATUR — De'Asia Curry participated in Operation Calculus when she was a student at Eisenhower High School, and the class helped her decide to become a teacher herself. Now Curry is teaching ...

An Elementary Treatment of Transient Problems in Linear Electrical Circuits, by Heaviside's Operational Method. By G. W. Carter. Pp. viii + 120. (Cambridge: At the ...

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.

The original version of this story appeared in Quanta Magazine. Calculus is a powerful mathematical tool. But for hundreds of years after its invention in the 17th century, it stood on a shaky ...