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Chris Bishop is a second year Mathematics with Economics student at UCL with a keen interest in applying mathematics in optimisation problems in real-world scenarios.

Easy to state, hard to prove: The Collatz conjecture
90 years later, we're still unable to prove this surprisingly simple statement
Dear Dirichlet, Issue 15
Weddings, holidays and catfish find their way into the prof's postbox this issue.
In conversation with Eugenia Cheng
We chat to the author of the best-selling book How to Bake Pi and pioneer of maths on YouTube
Going once, going twice… game theory?
A quick look at how to get the most bang for your buck the next time you're in a bidding war
Switching sides in a matrix equation
Looking for a neat description of this useful matrix part-inverse
Reinventing 2D: What a difference a matrix makes
How derivatives of matrices are being used in your day-to-day lives