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Nora is a master’s student at UCL, interested in applied maths. When not studying, you can (almost always) find her reading.

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 19
Game shows, flight and social media bots are among the problems solved in this issue's Dear Dirichlet agony aunt column
Significant figures: Sofya Kovalevskaya
Nora Koparan tells the story of the first female professor of mathematics
Polynomials’ order
Yuliya Nesterova orders some polynomials around
Modelling in a heartbeat
Learn how to model your heart one beat at a time ❤️
Switching sides in a matrix equation
Looking for a neat description of this useful matrix part-inverse