Optimisation…death of a (travelling) salesman

The Travelling Salesman Problem (TSP) asks: “Given a list of cities and the distances between each pair of cities, what is the shortest possible route that visits each city and returns to the origin city?” This seemingly simple question is important in operations research and theoretical computer science.

Banknotes…the price of beauty

There may not be a gold standard for beauty, but there may be a banknote standard for beauty, which is set by the judges of the prestigious International Bank Note Society (IBNS) Bank Note of the Year award. Uganda, Kazakhstan, Trinidad and Tobago and New Zealand have all won the award in recent years.  But […]