Nicola Pugno, at the University of Trento in Italy, has succeeded in making by far the toughest material in the world -- by taking a conventional piece of fiber... and tying it in a slip knot. This ...

This monthly journal, published since 1900, is devoted entirely to research in pure and applied mathematics, and, in general, includes longer papers than those in the Proceedings of the American ...

In 1876, Peter Guthrie Tait set out to measure what he called the “beknottedness” of knots. The Scottish mathematician, whose research laid the foundation for modern knot theory, was trying to find a ...