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

For years, a French mathematician searched for a proof that a gigantic number is prime. His method is still used 150 years ...

Researchers have created a prediction method that comes startlingly close to real-world results. It works by aiming for ...

In an era driven by complex data, scientists are increasingly encountering information that doesn't lie neatly on flat, ...

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