Earlier this year, a trio of mathematicians decided to make lemons into lemonade — and ended up making major headway on a problem that mathematicians have been thinking about for centuries.

Princeton University mathematician Manjul Bhargava was awarded today the 2014 Fields Medal, one of the most prestigious awards in mathematics, in recognition of his work in the geometry of numbers.

After outgrowing its original home, the National Museum of Mathematics has added new exhibits and an art gallery space in what was an empty storefront along the Avenue of the Americas in Manhattan. By ...