What do you want on the front of your Christmas cards? It might seem an idle question, but many companies (and even people) give it serious thought. But surely not mathematicians?
Well maybe not, but mathematics and mathematicians are very versatile. You could say they are in everything we do. Have a look at our season's greetings e-card, courtesy of Roger Penrose's P1 Tiling and Willam Joseph's design.
Let it snow.