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.

Corrected: This story has been updated to reflect Ralph Pantozzi’s full statement. Corrected: A previous version of this story misstated the location of Kent Place School. It is located in Summit, N.J ...

When the College Board launched its Advanced Placement Precalculus course in 2022, it aimed to expand students’ access to advanced math courses and open more doors for students to earn college credit ...