For Christmas I got one of those chalkboard mugs. Following the suggestion of someone in the office I wrote a maths equation on it, and tweeted it. Now I can’t stop. The only problem is a mug isn’t really a lot of space so I’ve been writing very little on the mug. Leaving the interested reader to find out more if they want. Only problem is, a lot of people don’t “get” what I’ve written on the mug. So I thought I would start writing a *very* short explanation post for the maths on the mug, with links to where you can find out more.

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```#mathsonamug pic.twitter.com/cbpCm7q1Id

— Dr. Sean (@seanelvidge) January 8, 2016

This one is easy to describe, it is simply, in my opinion (and many others!) the most beautiful equation. Thankfully the BBC have very recently run a story about it, so that saves me doing any explanation: http://www.bbc.com/earth/story/20160120-the-most-beautiful-equation-is-eulers-identity