This article was last updated on 13 October 2021. The basic reproduction number, also known as the R or R0, is the average number of people one person with an infectious disease will likely infect in ...

Recreational mathematics offers a vast playing field for amateur and professional mathematicians alike. It combines a sense of play with the joy of discovery. Sometimes, the results are mathematically ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...