Welcome to the first issue of Parabola Incorporating Function for 2006. The first two articles by Mike Hirschhorn are good illustrative examples of the sort of recreational games that you can play with mathematics.
As we go to press, media around the world have been reporting the latest round of awards of the coveted Fields Medal (popularly called the "Nobel Prize for Mathematics") which are awarded every four years.
In this issue we are delighted to reproduce three award-winning articles on Cryptography by Professor Nuno Crato. These articles were awarded first prize in a special competition organized by the European Mathematical Society on Raising Public Awareness in Mathematics.