The simplest shape traced out by a spinning needle (orange) is a circle, but聽shapes with a smaller area are possible, such as the deltoid (right), created聽by聽spinning a needle while its central point traces out a circle
Mathematicians have solved a decades-old problem related to spinning a needle, in what has been hailed as one of the most important mathematical results in recent times. Once seen as 鈥渋mpossible鈥, the solution should now unlock answers to a slew of other difficult problems that had seemed completely out of reach. 鈥淭he paper is perhaps the biggest breakthrough in mathematics of…
