Ian Stewart's Visions of Infinity: The Great Mathematical Problems is an entertaining and fresh look at some of the most vexing problems facing the field of mathematics. We asked him to pick the ...

For decades, a math puzzle has stumped the smartest mathematicians in the world. x 3 +y 3 +z 3 =k, with k being all the numbers from one to 100, is a Diophantine equation that's sometimes known as ...