four-colour theorem
Robert Hunt concludes our Origins of Proof series by asking what a proof really is, and how we know that we've actually found one. One for the philosophers to ponder...
If you thought you knew what geometry is all about, then this issue of Plus may change your mind. We explore a strange point-less geometry of spacetime, find out about hyperbolic geometry's amazing fractals, celebrate a geometric formula named after Leonhard Euler, the most prolific mathematician of all time, and try to calculate pi. This issue also contains the first ever Plus teacher package and, to celebrate our tenth birthday, continues our series on the history of Plus.
The new Maths KTN is showing business how to do mathematics and mathematics how to do business.
Road colouring problem solved
