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This post was part of the Chalkdust 2016 Advent Calendar.

Aryan is a PhD student in mathematics at Queen Mary University of London, working with categories in quantum algebra. He is often the cranky audience member in the front row.
More from Chalkdust

Proof
We review the second of this year’s nominees for Book of the Year
Winning Wythoff’s game
Molly Ireland presents a gambit which will impress your mates
Diagrammatic algebra: On the road to category theory
Aryan Ghobadi gives a maths lecture at a zoo
Chalkdust Issue 05 coming 7 March
Free launch party, 7.15pm. Come along! Free copies of Chalkdust, free pizza, and buy your own Chalkdust T-shirt.
Which mathematician are you?
Behind today's door... a quiz!
Crossnumber winners
Are you a winner?
