Two mathematicians have proved that a straightforward question—how hard is it to untie a knot?—has a complicated answer.

The simple interest formula is Interest = P * R * T. Many, or all, of the products featured on this page are from our advertising partners who compensate us when you take certain actions on our ...

We asked Seeking Alpha analysts Stephen Ayers and Edmund Ingham which obesity drug developer they thought could be the next ...

Quantum mechanics has at last been formulated exclusively with real numbers, bringing a mathematical puzzle at the heart of ...