Reverse mathematics is a vibrant programme in mathematical logic that investigates the axioms necessary to establish fundamental theorems throughout mathematics. Central to this endeavour are ...

It’s something that educators hear from students in classes, children express to caregivers as they start homework and even adults say to each other when it’s time to calculate the tip for lunch.

Artists make professions out of the belief that there are many ways of seeing. As it turns out, mathematicians believe the same thing—and they have the formulas to prove it. For Dutch-born, US-based ...