π = 3.14… 2/7
14th March and 22nd July are closely linked. These are Pi Day, and Pi Approximation Day, based on the representations of the numbers above in the month/day and day/month formats. Every Pi Day, mathematicians are commissioned to write articles like this one, some people recite the digits of
, and others use the day as an excuse to eat as much pie as possible. But why does π matter to mathematicians and mathematical biologists?