So which saint’s names were unlucky enough not to have survived at all? This walk is dedicated to two of them – St Leonard and St John.
Month: July 2021
4 colour map method
Have you ever tried to colour in areas on a map? Here we describe the four colour map method. This a mathematical problem first posed by Francis Guthrie in 1852. He was trying to colour in a map of the counties of England with the fewest possible colours (colour printing was expensive), and found he […]