Want facts and want them fast? Our *Maths in a minute* series explores key mathematical concepts in just a few words. From symmetry to Euclid's axioms, and from binary numbers to the prosecutor's fallacy, learn some maths without too much effort.

Maths in a Minute: Category theoryA quick introduction to an abstract concept that's useful in anything from genetics to cosmology.

Maths in a Minute: The wagon wheel effectHave you ever noticed the strange phenomenon of wheels appearing to move backwards while the vehicle is moving forwards? Aadit Jain explains why!

Maths in a minute: Semi-supervised machine learningMachine learning started with supervised learning and us providing all the training materials, but we are finding ways for algorithms to learn with far fewer resources.

Maths in a minute: The prime number theoremA quick look at one of the most important theorems in number theory.

Maths in a minute: Gradient descent algorithmsWhether you're lost on a mountainside, or training a neural network, you can rely on the gradient descent algorithm to show you the way!

Maths in a minute: Machine learning and neural networksMachine learning makes many daily activities possible, but how does it work?

Maths in a Minute: Simplices – the atoms of topologyIf you love triangles as much as we do, we have great news – you can have them in any dimension you want!

Maths in a minute: Artificial neuronsWhen trying to build an artificial intelligence, it makes sense to mimic the human brain. Artificial neurons do just that.

Maths in a minute: The Wells-Riley modelHow do you calculate your risk of catching an airborne disease?

Maths in a Minute: Computational fluid dynamicsThe mathematical equations governing fluid flow may have no known solutions, but maths still has the answers!

Maths in a minute: The positive predictive valueWhen you receive a positive test result for a disease, the chance you actually have it depends on how common the disease is.